Kids · Boys'
Boys' Helmets for 11 year olds
Size-matched helmets for 11 year olds, with color and style notes typically preferred by boys in this age range. Fit remains the priority - pattern and color second.
Open the helmets calculator
Helmets picks for 11 year olds
Check Amazon for current pricing and availability.
Bell
Bell Nomad 2 Jr. MIPS Youth Bike Helmet - Matte Pink (2022), Universal Youth (52-57 cm)
Universal Youth, 52-57 cm.
Giro
Giro Fixture MIPS Bike Helmet - Matte Black/Grey - Universal Adult (54-61 cm)
This offer is size Universal Adult (54-61 cm), color Matte Black/Grey. Measure head circumference and check the manufacturer size chart and certification label. Children under one year should not ride as bicycle passengers.
Kask
Kask Protone Icon - White, Large
S 50-54 cm, M 54-58 cm, L 58-62 cm
Lazer
Lazer Codax KinetiCore Bike Helmet
One-size adult shell for 54-61 cm heads. It is a good first helmet if the rider wants easy dial adjustment and does not need a race-light road lid.
Mongoose
Mongoose All Terrain Kids Bike Helmet (Ages 5-8)
Multisport kids helmet built for ages 5-8. Microshell shell stays light enough for skateboarding and scooter use, while the internal pads and adjustable dial keep it snug as kids grow.
Poc
POC Omne Air MIPS
Selected M 54-59 cm variant. Measure head circumference and check the manufacturer's size chart and physical fit before ordering.
Royalbaby
RoyalBaby Kids Helmet (Ages 5-13)
Designed for kids ages 5-13. Adjustable dial accommodates a growing child without needing a new helmet each season. Pair with the matching knee/elbow set for first-time riders.
Schwinn
Schwinn Classic Teddy Bear Helmet - XS 44-50cm
This offer is size X-Small (44 - 50cm), color Teddy Bear. Measure head circumference and check the manufacturer size chart and certification label. Children under one year should not ride as bicycle passengers.
Smith
Smith Persist MIPS
S 51-55 cm, M 55-59 cm, L 59-63 cm
Woom
Woom Ready Helmet - Medium Red
This offer is size M, 53-57 cm, color Red. Measure head circumference and check the manufacturer size chart and certification label. Children under one year should not ride as bicycle passengers.
Bell
Bell Nomad 2 Jr. MIPS Youth Bike Helmet - Matte Hi-Viz (2022), Universal Youth (52-57 cm)
Universal Youth, 52-57 cm.
Giro
Giro Fixture MIPS II Bike Helmet - Matte White/Grey - Universal Adult (54-61 cm)
Universal Adult, 54-61 cm.
As an Amazon Associate we earn from qualifying purchases. Purchases made through these links help support our free calculators.
What matters for 11 year olds
Eleven-year-olds sit right at the crossroads between kids and adult bikes. Most children this age fit a 26" kids bike, and taller 11-year-olds (over 148 cm) may fit an adult XS or S frame with 26" or 27.5" wheels. This transition requires careful attention to more than just wheel size - crank length, handlebar width, brake lever reach, and saddle width all differ between kids and adult bikes. Choosing a kids-specific 26" bike is usually the better option unless your child is large and experienced enough for adult proportions. At 11, most riders benefit from a 1x9 or 1x10 drivetrain, disc brakes, and a bike matched to their preferred riding style. This is the age where specialization makes sense: road, mountain, hybrid, or BMX.
Helmets sizing guidance
Measure head circumference at the widest point across the forehead. Most brands size: XS (50-53 cm), S (53-56 cm), M (56-59 cm), L (59-62 cm), XL (62+ cm). Kids helmets typically start at 47-50 cm. Always try before buying; fit varies by brand.
Most 11 year olds choosing helmets also compare fenders & mudguards for 11 year olds, gloves for 11 year olds, and kickstands for 11 year olds.
Expert tips
- If your 11-year-old is over 148 cm, visit a bike shop and try both a kids 26" and an adult XS - see which fits better
- Kids-specific 26" bikes have shorter cranks (140-155mm vs adult 170mm), narrower handlebars, and lighter weight
- This is a great age for mountain biking - many 11-year-olds have the fitness and skill for proper singletrack
- For road cycling interest, consider a kids-specific road or gravel bike with drop bars - several brands make them in 26"
Helmets head-to-head comparisons
Cross-shop the helmets 11 year olds actually consider - specs, fit, and the deciding factor.
Compare Bell Pint 48-52cm with Schwinn Classic Teddy Bear XS 44-50cm. Choose by measured head circumference, physical fit and certification.
A comparison of two adult recreational helmets with overlapping fit, but different listed features and price points.
Both are adult-use helmets with overlapping fit ranges; compare the listed features and exact offer details before buying.
Compare Giro Register MIPS II Helmet - Matte White/Grey and Kask Protone Icon - White, Large by their listed features, fit, and intended use.
Compare Giro Register MIPS II Helmet - Matte White/Grey and Lazer Codax KinetiCore Bike Helmet by their listed features, fit, and intended use.
Compare Kask Protone Icon - White, Large and Lazer Codax KinetiCore Bike Helmet by their listed features, fit, and intended use.
Two premium road helmets with different approaches to rotational-impact protection - Kask's WG11 protocol and the POC Omne Air MIPS. Compare their fit, retention, and current Amazon variants.
A compact Lazer kids helmet against a budget multisport helmet. Fit certainty and the child's actual head measurement matter more than the logo here.