Choosing the best dirt bike helmets for teens is harder than it looks, because most sizing charts stop at kids age 10 and the next shell jumps straight to an adult frame. A 13-year-old and a 16-year-old can end up in the same head circumference range and still need very different helmets, so I spent several weeks comparing shells, liners, straps and certification labels across ten youth models before writing this guide.
Everything here is a full-face off-road helmet, the only style that makes sense on a dirt bike, and every pick carries a visible DOT FMVSS 218 label. I also tracked weight in grams where the manufacturer publishes it, because a teen’s neck is carrying that mass for an entire ride day and it changes how long they stay in the saddle.
This guide is updated for 2026 and covers riders roughly 13 to 18, plus the parents buying their first helmet or replacing one after a crash. If you are also shopping the machine itself, our [kids electric dirt bikes guide] covers the entry bikes most teens start on.
Table of Contents
- Top 3 Picks for the Best Dirt Bike Helmets for Teens (October 2026)
- All 10 Dirt Bike Helmets for Teens at a Glance
- Why Teens Need Different Helmets Than Kids
- 1. XFMT Youth Dirt Bike Helmet DOT Approved Kids Full Face Motocross Helmets
- 2. GLX GX623 Youth ATV and Dirt Bike Helmet Combo, DOT
- 3. TCMT Youth Kids Dirt Bike Helmet DOT Approved Full Face Motocross Gear
- 4. Oumurs Youth Dirt Bike Helmet DOT Approved, Kids Full Face Motocross Helmet
- 5. WOW Youth Kids Motocross BMX MX ATV Dirt Bike Mountain Helmet Storm Black
- 6. ILM Youth ATV Helmet Kids Dirt Bike DOT ECE Z705, Full Face Motocross Set
- 7. Youth Kids Dirt Bike Helmet Full Face Motocross Red Spider Helmets
- 8. ILM Youth and Kids Dirt Bike Helmets Motocross ATV Offroad Full Face Motorcycle Helmet, Model 128YS
- 9. SLMOTO Youth ATV Helmet DOT Youth Kids Motocross Offroad Motorcycle Helmet
- 10. Yesmotor Youth Kids Dirt Bike Helmet DOT Approved, Full Face Motocross Set
- How to Measure a Teen’s Head for a Dirt Bike Helmet
- Youth Dirt Bike Helmet Size Chart by Head Circumference
- DOT vs ECE 22.06 vs Snell M2020: What Each Label Means
- Is MIPS Worth It for Teens?
- Fit Troubleshooting: Four Problems Parents Hit Most
- Frequently Asked Questions
- Final Verdict: Which Dirt Bike Helmet Should Your Teen Wear?
Top 3 Picks for the Best Dirt Bike Helmets for Teens (October 2026)
XFMT Youth Helmet
- DOT FMVSS 218 ABS shell
- About 1030 g
- Youth sizes 49-56 cm
- Gear bundle included
GLX GX623 Youth Combo
- DOT certified shell
- 14 vents plus brow ports
- Rotational energy management
- One-year warranty
TCMT Youth 4-in-1 Gear
- Multi-density EPS liner
- Youth S through XL
- Intake and exhaust vents
- Helmet plus gloves and goggles
All 10 Dirt Bike Helmets for Teens at a Glance
| Product | Specifications | Action |
|---|---|---|
| XFMT Youth Dirt Bike Helmet |
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| GLX GX623 Youth Helmet Combo |
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| TCMT Youth Dirt Bike Helmet |
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 Oumurs Youth Dirt Bike Helmet |
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 WOW Youth Motocross Helmet |
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 ILM Z705 Youth Helmet Set |
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 TCT Youth Motocross Helmet |
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 ILM 128YS Youth Helmet |
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 SLMOTO Youth ATV Helmet |
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 Yesmotor Youth Dirt Bike Set |
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Check Latest Price |
Why Teens Need Different Helmets Than Kids
Teens have a specific fitting problem that the word youth hides: the size run simply runs out. Youth shells in this group top out around 55 to 56 cm, which is roughly the point where a growing head starts overlapping an adult small shell. That crossover is where most parent forum questions land, and it is why a teen who just grew out of a kid helmet often needs a different shell shape rather than the next size up.
Weight matters more as riders get bigger and ride longer. The lightest published figure in this group is about 1030 g, while several shells here weigh between 1.5 and 1.7 kg. Parents in riding communities consistently flag neck fatigue and headaches from heavy helmets on smaller riders, and a teen who is tired at the 20-minute mark is a teen who cuts the ride short.
Style also shifts at this age. Younger kids accept whatever colour arrives, while teens tend to refuse a helmet they dislike, and a helmet that sits unused on a shelf protects nobody. Letting your teen try the shell on in a shop and confirm they will actually wear it is the single most useful thing you can do before buying.
1. XFMT Youth Dirt Bike Helmet DOT Approved Kids Full Face Motocross Helmets
XFMT Youth Dirt Bike Helmet DOT Approved Kids Full Face Motocross Helmets
DOT FMVSS 218 certified ABS shell
High-density EPS liner
About 1030 g
Youth 49-56 cm
Pros
- Lightest published weight in this group at about 1030 g
- DOT FMVSS 218 certification on an ABS shell
- Removable washable sponge liner
- Youth sizes cover 49 to 56 cm
Cons
- Bundled goggles and gloves tend to run oversized
- Double D-ring strap is stiff for younger riders
- Ventilation is adequate rather than strong
This is the helmet I kept coming back to while comparing the group, because the weight figure is the one number that changes how long a teen rides. At roughly 1030 g it sits well under the shells that weigh 1.5 kg or more, and owners report that young riders can stay in it longer before neck fatigue becomes an issue. The shell is ABS with a high-density EPS buffer layer and a visible DOT FMVSS 218 label.
The sizing run is the other reason it works for a broad teen bracket. Published youth bands cover 49 to 50 cm, 51 to 52 cm, 53 to 54 cm and 55 to 56 cm, which is one of the widest ranges here and covers most of the awkward growth years.
Reviews consistently praise accurate sizing against the published chart and durable construction, with several owners reporting years of use out of the same shell. The inner liner is a removable, washable non-woven composite sponge, which matters more than it sounds after a wet trail day.
Three vents sit at the chin, top and back, and the visor adjusts. That ventilation is the model’s honest weak spot, since riders report sweating after about half an hour of hard riding in hot weather.
Who this helmet suits
A teen on a 50cc or mini bike, a family trail rider, or anyone who wants the lightest certified shell in the lineup with a full accessory bundle. The kit includes goggles, gloves and a carry bag, so a first-time rider has a working set on day one.
It also suits parents who are nervous about fit, because the size chart is clear and the range is wide enough that a growth spurt does not immediately push you into a different brand.
Where it falls short
The double D-ring strap needs practice, and younger riders often cannot buckle it unaided, which is exactly the child who forgets to wear the helmet. The bundled goggles and gloves are reported as running larger than the helmet size ordered.
For a teen riding hard in summer heat on long trail days, a shell with deeper vent performance would be a better match.
2. GLX GX623 Youth ATV and Dirt Bike Helmet Combo, DOT
GLX GX623 Youth ATV & Dirt Bike Helmet Combo, DOT
DOT FMVSS 218 certified
14 vents with two brow ports
Oval hard shell
Helmet plus goggles and gloves
Pros
- Strongest vent count in the group at 14 vents
- Shell molding aimed at rotational energy management
- Runs true to the published size chart
- One-year limited manufacturer warranty
Cons
- Visor attachment screws can loosen over time
- Ratcheting plastic strap feels basic
- Included sunshade is described as flimsy
Ventilation is where this shell wins. Fourteen vents, including two brow ports that direct air across the forehead, is the most aggressive airflow design of the ten I compared, and it is the reason I would pick it for summer track days or dusty trail riding.
The moulding process is advertised as rotational energy management rather than a MIPS slip plane, which is a weaker but still useful claim for angled impacts. The shell itself is a hard oval shape, and the package includes YH15 goggles with a wider field of view plus YH08 gloves.
Owners regularly compare this helmet favourably against name-brand motocross shells on cost while still rating the protection highly. Sizing runs true to the published chart, a common complaint with budget models, and it comes with a one-year limited manufacturer warranty, longer than most in this group.
Small hardware is where the budget shows. The ratcheting plastic chin strap feels cheap next to a metal buckle, the sunshade is described as flimsy, and visor screws are reported loosening over time.
Who this helmet suits
A teen who rides in hot weather, on dusty tracks, and who will notice the difference between average airflow and real airflow. The included goggles also mean a first kit is complete without a second order.
It is equally a good fit for families who want one purchase that covers helmet, eye protection and hands without chasing three listings.
Where it falls short
The ratcheting strap and flimsy sunshade are the two components most likely to disappoint a teen who cares about how gear looks and feels. If the rider already owns good goggles and gloves, this bundle value shrinks considerably.
It is also heavier than the lightest shells here, which matters for smaller riders on long days.
3. TCMT Youth Kids Dirt Bike Helmet DOT Approved Full Face Motocross Gear
TCMT Youth Kids Dirt Bike Helmet DOT Approved Full Face Motocross Gear
DOT FMVSS 218 certified
ABS shell with multi-density EPS
Youth S to XL
Four-piece gear set
Pros
- Multi-density EPS liner is uncommon at this tier
- Very large review base across the sizing range
- Complete kit with helmet gloves goggles and bag
- Multiple intake and exhaust vents
Cons
- Smallest youth size still fits loosely on young children
- Bundled gloves and goggles are often oversized
- Visor and liner hardware feel basic
The multi-density EPS liner is the detail that separates this from a generic budget shell, since different foam densities manage low and high energy impacts differently. It is paired with a high-impact ABS shell and the same DOT FMVSS 218 certification as the picks above.
The listed weight is 1.66 kg, which makes it one of the heavier shells in the group and the main reason it does not win the overall slot. For a teen riding short sessions close to home, that trade is usually worth it.
Buyers treat this as a dependable starter kit that punches above its weight, and the volume of owner feedback across the whole size range is reassuring. Kids tend to keep it on, which is the practical difference between a helmet on the head and a helmet in the closet.
Sizing runs from 19.15 to 22.05 inches across youth small through extra large, so the band covers most teens without jumping to an adult shell.
Who this helmet suits
Families buying a first helmet for a 13 or 14 year old who is on a small bike and rides locally. Everything needed for a first session is in the box, and the reported sizing accuracy means fewer exchanges.
It is a sensible stopgap that holds its value for a couple of seasons before the rider outgrows it and steps up a tier.
Where it falls short
Weight is the honest drawback, and riders who want long weekend trail days will feel it. The smallest listed size also still runs loose on children under about four, so measure rather than assume.
The bundled gloves and goggles are the most commonly criticised part of the package, and the visor and liner hardware reads as basic next to a premium shell.
4. Oumurs Youth Dirt Bike Helmet DOT Approved, Kids Full Face Motocross Helmet
OUMURS Youth Dirt Bike Helmet DOT Approved, Kids Full Face Motocross Helmet
DOT FMVSS No. 218 certified
About 1.05 kg
Bands 490 to 560 mm
Washable liner and cheek pads
Pros
- Among the lightest shells in the group at about 1.05 kg
- Head size bands published in exact millimetres
- Machine washable liner and cheek pads
- Includes gloves goggles and storage bag
Cons
- Bundled gloves often run large for younger children
- Smallest size gets outgrown quickly
- Bundle goggles are basic and untinted
This is the pick I would choose for a 13-year-old who is still growing fast, for one reason above all: weight. The listed figure is about 1.05 kg, and the manufacturer describes it as up to 20 percent lighter than typical youth models, which lines up with the neck fatigue complaints parents report repeatedly.
The sizing is unusually precise for a budget helmet, with bands published in millimetres from 490 to 500 mm for small, 510 to 520 mm for medium, 530 to 540 mm for large and 550 to 560 mm for extra large. That removes most of the guesswork parents complain about.
Owners praise the light weight, comfortable padding and clear sizing guidance, and many report kids are happy to wear it on four wheelers and dirt bikes. The visor rotates and detaches, and the liner and cheek pads are machine washable, which holds up well to sweat and sun exposure.
The shell is ABS with an expanded polystyrene liner and a DOT FMVSS 218 label, which is the minimum standard worth buying for a teen.
Who this helmet suits
A younger teen on a small bike who complains about neck tiredness on longer rides, and any parent who wants the sizing decision made with a tape measure rather than a guess. The package also covers gloves, goggles and a storage bag.
Teens who ride atv and street machines as well as dirt bikes can use the same shell, since it is rated across those uses.
Where it falls short
The extra large band starts at 550 mm, so a teen with a bigger head will be pushed toward an adult shell sooner than with the widest-range pick in the group.
The gloves in the bundle are repeatedly reported as oversized for younger children, and the included goggles are basic and untinted, so expect to replace goggles for a teen who rides in bright sun.
5. WOW Youth Kids Motocross BMX MX ATV Dirt Bike Mountain Helmet Storm Black
WOW Youth Kids Motocross BMX MX ATV Dirt Bike Moutain Helmet Shark Blue
DOT approved
Thermoplastic alloy shell
Youth large 53-54 cm
Lift-release strap
Pros
- Highest listed average rating among picks with meaningful volume
- Lift-release strap is simpler than D-rings for small riders
- Glossy UV protective finish holds up well
- Heavily cushioned removable washable padding
Cons
- Sizing can run small and buyers recommend sizing up
- Some colours render more purple than the swatch
- Chin strap takes practice for younger riders
Graphics and finish are the reason this one stands out for a teen. The glossy UV protective coating gives it a showroom look that survives sun exposure better than matte shells, and at 4.8 average across a solid review base it holds the strongest satisfaction score of the picks with meaningful volume.
The shell is a lightweight thermoplastic alloy with foam padding inside, and the listed weight is 1.51 kg. Breath vents sit on the top and back of the shell, and the padding is removable and washable.
The strap system deserves attention because it differs from most of the group. A lift-release design with padded metal covers is far easier for a smaller rider to manage than a double D-ring, which removes a common reason kids skip the buckling step.
The one sizing warning is real: several buyers recommend ordering a size up because this shell runs small. The large youth size is listed at 53 to 54 cm, or 20.9 to 21.3 inches.
Who this helmet suits
A teen who cares how the helmet looks and will refuse to wear something plain, and a younger rider who struggles with D-ring straps. It works well for weekend trail riding and casual track days.
Parents who have fought the buckling battle will find the lift-release strap a genuine relief.
Where it falls short
If the head sits between two published bands, be careful. Because the shell runs small, sizing up on this model is more defensible than with the others, but measure first.
Colour accuracy is a recurring complaint, with some shades reading more purple than expected, and the vent layout is simpler than the 14-vent shell in this group.
6. ILM Youth ATV Helmet Kids Dirt Bike DOT ECE Z705, Full Face Motocross Set
ILM Youth ATV Helmet Kids Dirt Bike DOT ECE Z705, Full Face Motocross Set
Dual DOT FMVSS 218 and ECE 22.06
Net weight about 2.4 pounds
Five-year warranty
Four-piece kit
Pros
- Only pick here with dual DOT and ECE 22.06 certification
- Light net weight of about 2.4 pounds
- Five-year warranty is the longest here
- Four-piece kit with gloves balaclava and goggles
Cons
- Smallest review volume in the group at 557
- Hook and loop strap needs strap tension to hold
- Full face shell with balaclava runs warm
This is the one pick in the group with dual certification, carrying both DOT FMVSS 218 and ECE 22.06 labels. ECE 22.06 is the European standard that replaced the older ECE 22.05, and it applies more demanding oblique and rotational test methods, so a dual-certified shell is the safest specification available in a youth helmet.
The manufacturer describes the net weight as 2.4 pounds, around 1.1 kg, and puts it at roughly 20 percent lighter than comparable models. The shell is ABS with high-density EPS padding, multiple vents, and removable sweat-absorbing cheek pads.
The accessory bundle is unusually complete for this tier, adding gloves, a balaclava face mask and UV-resistant sponge-cushion goggles. The visor is removable and adjustable, and the buckle is a quick release rather than a D-ring.
The warranty runs five years, longer than anything else here, and the quick release buckle makes it easy to put on and take off independently.
Who this helmet suits
A teen whose family cares most about the certification label, and anyone riding in Europe where ECE 22.06 matters for legal or club compliance. The light net weight suits smaller riders and long days.
The balaclava is a genuine bonus for dusty trail riding, where fine grit gets everywhere.
Where it falls short
The review base is the smallest in the group, so the long-term track record is less proven than the alternatives. Fit depends on hook-and-loop strap tension rather than a D-ring, which some riders find less precise.
A full face shell plus balaclava can feel warm in hot summer conditions, and the hook-and-loop closure takes some getting used to.
7. Youth Kids Dirt Bike Helmet Full Face Motocross Red Spider Helmets
Youth Kids Dirt Bike Helmet Full Face Motocross Red Spider Helmets
DOT safety standard compliant
ABS shell with high-density EPS
Youth large 53-54 cm
Set with gloves and goggles
Pros
- Generous padding holds up to drops and daily handling
- Youth large band of 53-54 cm suits bigger teen heads
- Vents cut wind noise and improve circulation
- Helmet gloves goggles and bag included
Cons
- Goggles and gloves in the kit run larger than the helmet ordered
- Arrives in thin packaging that is easily crushed
- Some units show a cosmetic visor scratch
The TCT shell is a good answer for a teen whose head is pushing the top of the youth bands. The listed large youth size is 53 to 54 cm, or 20.86 to 21.26 inches, and the heavily padded sponge lining is what makes the fit forgiving at the top of a range.
Construction follows the same pattern as the other budget shells here, with an ABS outer, a high-density EPS buffer layer and a non-woven composite sponge lining. The shell carries DOT safety standard compliance and vents placed around the shell for circulation and reduced wind noise.
Parents highlight padding, fit and durability, with helmets surviving drops and daily abuse from young riders over a year or more. Reported helmet fit is consistently good, which is more than can be said for the accessories.
The set includes one pair of gloves, one portable bag, one youth helmet and one pair of goggles, so it functions as a complete first kit.
Who this helmet suits
A teen with a head in the 53 to 54 cm range who wants a forgiving, well-padded shell rather than a tight one. It suits first-time riders and households replacing a damaged kids helmet.
Parents whose riders are hard on gear will value how the padding and shell hold up to drops.
Where it falls short
The accessories are the weak point. Gloves and goggles are frequently described as oversized relative to the helmet size ordered, so budget separately if your teen has larger hands or wants proper goggles.
Packaging is thin cardboard that can arrive crushed, and some units show a cosmetic scratch on the visor out of the box.
8. ILM Youth and Kids Dirt Bike Helmets Motocross ATV Offroad Full Face Motorcycle Helmet, Model 128YS
ILM Youth & Kids Dirt Bike Helmets Motocross ATV Dirtbike BMX MX Offroad Full Face Motorcycle Helmet, DOT Approved Model 128YS (Matte Black, Youth-Large)
Meets FMVSS 218 and DOT
ABS shell with vented EPS liner
Oval hard shell
Helmet only
Pros
- Sold as helmet only so you can pair your own goggles
- Wide youth and adult size and colour range
- Detachable visor rotates to track the sun
- Detachable and washable inner pads
Cons
- Goggles and gloves are not included
- Hook and loop strap snags more easily than a D-ring
- Vented EPS liner is bulkier than slim-profile youth shells
This is the pick for a teen who already owns goggles they like, or who wears prescription inserts. Because the model is sold as a helmet only, nothing forces a bundled goggle that will not match a preferred strap or lens tint.
The shell is ABS with a thick high-density fully vented EPS liner, listed at 1.68 kg, with front and back air vents. The shape is a hard oval, which is the head shape most likely to suit teens who struggle with rounder or longer shells.
The visor detaches and rotates, so it can follow the sun through a long day, and the inner pads detach for washing. Youth and adult sizes are offered from the same model, which makes the eventual transition to an adult frame easier.
It meets or exceeds FMVSS 218 and DOT standards, which is the certification baseline worth insisting on for any teen helmet.
Who this helmet suits
A teen who has outgrown child goggles, or who rides in bright conditions and wants to pick a tinted lens deliberately. Riders with an oval head shape will find this shell easier to seat than a rounder one.
It is also a sensible choice if you plan to move up to an adult size of the same model later.
Where it falls short
Buying the helmet alone means a separate purchase for eye protection, and a helmet without goggles is not ready for the trail. The hook-and-loop closure snags more easily than a D-ring system and offers less precise tension.
The vented EPS liner is bulkier than slim-profile youth shells, and at 1.68 kg this is one of the heavier options in the group.
9. SLMOTO Youth ATV Helmet DOT Youth Kids Motocross Offroad Motorcycle Helmet
SLMOTO Youth ATV Helmet DOT Youth Kids Motocross Offroad Motorcycle Helmet
Meets FMVSS 218 and DOT
Composite ABS shell
Youth S through XL
Double D-ring strap lock
Pros
- Double D-ring strap gives precise tension
- Lightweight composite ABS shell with glossy UV finish
- Removable washable breathable liner
- Size chart matches so ordering is confident
Cons
- Included gloves run off in size depending on age
- Double D-ring buckle takes effort for younger riders
- Housings and graphic finishes are basic next to premium brands
The double D-ring lock is the reason to shortlist this shell. A D-ring strap gives the most precise, repeatable tension of the closure types in this group, which means a helmet that stays planted instead of rotating once the rider hits a bump.
The shell is a lightweight composite ABS with a glossy UV protective finish and multiple ventilation openings, and the liner is removable, washable and breathable. It meets or exceeds FMVSS 218 and DOT standards.
Buyers like that the helmet fits true to the published chart, is light and comfortable enough that reluctant kids actually wear it, and looks appealing in the graphic designs. Sizes run from 19.15 to 22.05 inches across youth small through extra large.
The package includes the helmet, a helmet bag, goggles and a pair of gloves, so it is a full kit on paper.
Who this helmet suits
A teen riding atv or dirt bike who wants a strap that does not loosen over a long day, and any rider who prefers the security of D-rings. The wide size range covers most of the teen bracket.
It works well for a rider who will not put a helmet on unless the strap feels secure.
Where it falls short
D-rings are harder for small hands than the quick-release and lift-release options elsewhere in this group, so younger riders need help on the first few rides.
The bundled gloves run off in size depending on the child’s age, and the housing and graphic finish reads as basic beside a premium motocross shell.
10. Yesmotor Youth Kids Dirt Bike Helmet DOT Approved, Full Face Motocross Set
Yesmotor Youth Kids Dirt Bike Helmet DOT Approved, Full Face Motocross Set
Meets DOT and FMVSS 218
ABS shell with EPS lining
Aerodynamic vented shell
Press-and-hold release strap
Pros
- Press-and-hold chin strap kids can operate alone
- Aerodynamic shell with multiple air intakes
- Removable washable lining and adjustable visor
- Set includes goggles gloves and dust mask
Cons
- Lowest average rating in the group at 4.5
- Bundled gloves and dust mask are adult sized
- Bundled goggles and gloves run large for younger riders
The press-and-hold release chin strap is the design decision here that matters most for a teenager. A child can unfasten and refasten it without adult help, which removes a genuine barrier to wearing the helmet on their own.
The shell is aerodynamic ABS with EPS lining and multiple air intakes to reduce wind noise, meeting DOT and FMVSS 218 standards. Listed weight is 2.1 pounds, and the visor is removable and adjustable for changing light.
Owners generally like the fit for kids roughly five and up, the light weight and good ventilation, and report that children are happy to wear it. The package contains the helmet, goggles, gloves and a dust mask.
It is the lowest-rated pick in the group at 4.5, which still reflects a broadly satisfied customer base rather than a problem listing.
Who this helmet suits
A teen who rides independently to the track or trails and needs a strap they can manage alone. The dust mask is a bonus for dusty trail conditions.
Families wanting one package that covers helmet, eye protection, hands and face protection without a second order.
Where it falls short
The bundled accessories are adult sized even with the smallest helmet, and the dust mask is no exception, so expect to replace gloves and goggles. The rating is the lowest of the ten picks, with a smaller share of detailed long-term feedback.
The press-and-hold release also means fewer adjustment points than a D-ring strap if you want to fine-tune tension.
How to Measure a Teen’s Head for a Dirt Bike Helmet
Measure the head circumference in centimetres, then match it to a published size band. Do not guess from age, because head size varies far more between two 14-year-olds than between a 14-year-old and a 10-year-old.
Wrap a soft tape measure around the head just above the eyebrows and ears, keeping it level across the forehead and around the widest point at the back.
Sight the measurement from above and check it sits level rather than tilting, since a tilted tape gives a falsely short number.
Read the centimetre figure and convert it to inches by dividing by 2.54, or simply measure in inches if that is easier.
Match the figure to the helmet’s published band. If the head sits between two bands, note the shell shape as well as the number.
Try the shell on with the chin strap buckled and check it does not rotate more than about an inch when the head moves side to side.
The 2 2 2 rule is the fit test most riders know: two fingers should fit between the chin strap and the jaw when buckled, the helmet should sit level across the forehead, and two seconds of shaking should not produce noticeable movement. Parents searching for a general bike helmet sizing rule will recognise it immediately, and it applies just as well to a full-face off-road shell.
Do not size up for growth. A loose helmet rotates on impact, and a rotating helmet does not stay over the impact site, which defeats the purpose of the EPS liner. Buying a snug shell now and replacing it later is safer and cheaper than a poor fit for two seasons.
Head shape matters as much as the number. Round heads suit rounder shells, longer heads suit oval shells, and intermediate shapes sit between the two. The oval hard shell in this group is a common match for teens who find rounder shells uncomfortable at the temples.
Youth Dirt Bike Helmet Size Chart by Head Circumference
Use this chart to map a measured head to a size band, then confirm against the individual helmet listing. Ranges below are the bands published by the helmets in this roundup, so a head that falls between two rows should be tried in both.
Head circumference of 49 to 50 cm, or 19.29 to 19.69 inches, maps to youth small. It is covered by the XFMT shell and by the smallest band in the TCMT and SLMOTO ranges. Expect a young rider rather than a teen here.
A head of 51 to 52 cm, or 20.08 to 20.47 inches, maps to youth medium, the band most 12 and 13 year olds fall into. This is the starting point for most first dirt bike helmets.
At 53 to 54 cm, or 20.87 to 21.26 inches, you are in youth large. That is the band for a 14 to 15 year old and it is covered by the WOW, TCT-MOTORPARTS and XFMT shells in this group.
At 55 to 56 cm, or 21.65 to 22.05 inches, you are at youth extra large. Only the widest-range shells here reach it, including the XFMT at 55 to 56 cm.
Once a head passes roughly 56 to 57 cm, stop looking at youth labels and move to an adult small shell. That crossover is the defining sizing problem for 16 to 18 year olds, and an adult small frame often seats better than an outgrown youth extra large because the shell proportions change, not just the number.
DOT vs ECE 22.06 vs Snell M2020: What Each Label Means
DOT FMVSS 218 is the minimum standard worth buying, ECE 22.06 is the tougher international standard, and Snell M2020 is a voluntary race standard that goes further still. For a teen dirt bike rider, any helmet with a visible DOT FMVSS 218 label is the baseline; dual DOT and ECE 22.06 certification is the better specification.
DOT FMVSS 218 is the US legal requirement for motorcycle helmets and applies mainly to straight impacts at defined test speeds. It is inexpensive to obtain, which is why so many budget shells carry it and why it appears on nearly every helmet in this roundup.
ECE 22.06 replaced ECE 22.05 and adds more demanding oblique and rotational impact testing. ECE 22.06 is required across most of Europe and is common on helmets sold worldwide, and it is the label to look for if a rider races or rides in Europe.
Snell M2020 is a Snell Memorial Foundation standard used in motorsport, with more demanding test procedures than DOT. It appears on racing helmets rather than youth trail models, which is why none of the ten picks here carry it.
One more term you will see: MIPS. It is not a certification but a slip-plane or rotational-impact technology fitted inside the helmet, and it is discussed separately below.
Is MIPS Worth It for Teens?
MIPS is worth it if you can get it in the size you need, because it reduces rotational brain motion on angled impacts, which is exactly the kind of impact a teen throws when a dirt bike lands sideways. It is not worth buying a badly fitting shell just to get the label.
In plain terms, most helmets manage the impact energy that arrives straight on. MIPS adds a low-friction layer between the liner and the head that lets the helmet slide a short distance during an oblique hit, which reduces the twisting motion transferred to the brain.
Here is the honest limitation. None of the ten helmets in this roundup carry a MIPS slip plane, because at youth sizing the technology is expensive and rarely fitted. The closest equivalent in this group is the GLX shell moulding marketed for rotational energy management, which is a different and weaker claim.
What that means in practice: prioritise a correct DOT or ECE 22.06 certification, a snug fit, a light shell and a fresh helmet. If your teen is racing competitively or progressing toward it, plan to move to an adult shell at the size crossover where MIPS-equipped models become common.
Fit Troubleshooting: Four Problems Parents Hit Most
If the helmet rotates more than an inch when buckled, the cause is almost always a size that is too large. Fix it by moving down a size or tightening the strap, and never solve rotation by adding padding that was not supplied with the helmet.
If the visor lifts or flaps at speed, the visor screws or detents have loosened. Check the attachment points and reset the visor angle, or replace the visor rather than riding with a loose peak.
If there are pressure points above the temples after twenty minutes, the shell shape does not match the head. Oval hard shells suit longer heads, and no amount of cheek pad padding will fix a wrong shell shape, so swap shapes rather than pads.
If the rider keeps taking the helmet off after a short ride, treat it as a weight or heat problem before anything else. Move to a lighter shell with deeper vents, and confirm the liner is clean, since compressed foam and sweat together cause the headaches parents describe.
If the bundled goggles and gloves fit poorly, that is normal for this price tier and does not mean the helmet is wrong. Many families end up replacing the accessories and keeping the shell, which is a reasonable outcome when the helmet itself fits and is certified.
Frequently Asked Questions
What is the best dirt bike helmet for a teenager?
The XFMT Youth Helmet is our top pick for teens because it is the lightest certified shell in this group at about 1030 g, carries a DOT FMVSS 218 label, and covers head sizes from 49 to 56 cm so a growth spurt does not immediately force a brand change. For teens who ride in hot weather, the GLX GX623 with 14 vents is the stronger ventilation choice.
How do I size a dirt bike helmet for a teenager?
Measure the head circumference in centimetres just above the eyebrows and ears, keeping the tape level, then match that number to the published size band on the helmet listing. A head of 51 to 52 cm maps to youth medium, 53 to 54 cm maps to youth large, and above roughly 56 to 57 cm you should move to an adult small shell.
What is the 2 2 2 rule for bike helmets?
The 2 2 2 rule is a fit test: two fingers should fit between the chin strap and the jaw when buckled, the helmet should sit level across the forehead without tilting, and the helmet should not shift noticeably when the head moves side to side. On a full-face dirt bike helmet this last check matters most, because rotation on impact defeats the liner.
Is Snell or ECE 22.06 better?
ECE 22.06 is the better choice for most riders because it is a mandatory, internationally recognised standard that includes oblique and rotational impact testing, while Snell M2020 is a voluntary motorsport standard found mainly on racing helmets. DOT FMVSS 218 is the legal minimum in the United States. The ILM Z705 in this roundup is the only pick carrying both DOT and ECE 22.06.
Should a teen move from a youth helmet to an adult size?
Yes, once a measured head passes roughly 56 to 57 cm, stop looking at youth labels and try an adult small shell. Adult small frames are proportioned differently, so they often seat better than an outgrown youth extra large. The crossover usually arrives between ages 16 and 18, and it is also when MIPS-equipped models and true race helmets become available.
Final Verdict: Which Dirt Bike Helmet Should Your Teen Wear?
Pick the XFMT Youth Helmet if your teen is between 13 and 15 and you want the lightest certified shell, the widest size range and a complete gear bundle in one box. Move to the GLX GX623 if summer heat and dust are the main complaint, since nothing else here ventilates as aggressively.
Pick the ILM Z705 when the certification label matters most to you, because it is the only helmet in this group carrying both DOT FMVSS 218 and ECE 22.06, with a five-year warranty behind it. If your teen already owns goggles, the ILM 128YS sold as a helmet only is the cleaner fit.
Measure before you order, do not size up, and replace any helmet after a real impact. Whatever you choose from the best dirt bike helmets for teens in this 2026 guide, buy it new, fit it in person where you can, and confirm your teen is genuinely happy to wear it before the first ride.
If you are also putting together the rest of the setup, our [best bike helmets roundup] covers road and trail options, and our [teen gift guide] works well for riders who want a matched helmet and gear package.