Best Adjustable Bike Helmets in 2026

MARKET-LEADING PROTECTION: Engineered in Giro’s category-leading helmet test lab.

COMFORT: Easily adjust vertical position and tension with the Roc Loc Jr. fit system.

CERTIFICATION AND VENTILATION - Complies with the US CPSC Safety Standard for Bicycle Helmets for Persons Age 1 and Older (Extended Head Protection). 8 vents

This Schwinn Thrasher lightweight helmet is designed for youth. Suggested age range: 8-14 years old. Suggested head circumference: 21.25-22.88 inches

Full Schwinn 360° Comfort featuring an adjustable dial fit knob and full-range padding for the perfect custom fit.

Two microshell layers and full-coverage EPS foam construction provides lightweight durability

Recommended for children 5-8, but will fit most heads measuring 50-54cm

Always take a head measurement. Head sizes and shapes can vary, even within an age range. Using a helmet that doesn't fit can be dangerous.

Side squeeze buckle for easy adjustment

STYLE & DESIGN - Designed after the tried and true classic bicycle helmet, low profile with great coverage in a variety of colors.

FIT SYSTEM - Our True Fit system for easy one step adjustment every time you ride, it’s that simple.

REFLECTORS - High-impact reflectors for visibility.

A HELMET YOU’LL WANT TO WEAR: Our founder created the first ever stylish bike helmet to keep people who bike and skate safe, while expressing their personal style. She designed a functional and lightweight helmet that doesn’t sacrifice style for safety.

LOCK YOUR HELMET WITH YOUR BIKE: Our patent-pending PopLock is the most convenient way to leave your bicycle helmet behind. Access the hidden channel behind the logo mark, and pop your U-Lock or chain lock through. Perfect for the daily commuter.

GET THE PERFECT FIT: Refer to the fit guide in the images to find the correct size. Tighten or loosen your bicycle helmet with our Dial Fit System in the back of your helmet to get the perfect fit for every ride. Doesn’t fit? Contact us!

Adjustable Helmet Size: VG110 model bike helmet is suitable for adult men and women, 3 sizes available, size M: 21.3-22.8 inch (54-58 cm); size L: 22.4-24 inch (57-61 cm); size XL: 23.2-24.8 inch (59-63 cm). It is easy to adjust the bicycle helmet size with hand. Our bicycle helmet will give you a comfortable and happy cycling trip.

Cool and Lightweight Cycling Helmet: Our bike helmet is designed with 21 breathable vents, the cooling vents can move airflow over your head to stay cool and dry. This cycling helmet only 310g (0.68 lb) will not cause any burden to the rider's head during cycling.

Impact Resistance: Our bike helmet is made of high-density PC shell and EPS foam, with durable hard shell and soft pad can absorb the pressure caused by external impact. Our bicycle helmet provides better protection when road cycling or mountain biking, greatly helping to decrease and buffer the impact.

✅【SAFE AND RELIABLE】 Kids/Youth ATV Helmets make sure kids are safe, DOT safety standards. It has a great amount of padding and protection inside,which provides excellent layers of protection.

✅【SNUG AND COMFORTABLE】 Kids/Youth ATV Helmets are very comfortable and not too heavy for the kids. It is Great gifts or present for your daughter, son, grandson, granddaughter, child, kids and Grandchildren on Christmas Day, New Year, Birthday.

✅【MULTIPLE AIR VENTS DESIGN】Kids/Youth ATV Helmet has multiple air vents around the helmet to maximize air circulation, make fresh air keep entering the helmet, You can have a good riding experience. The optimized vent reduces the wind noise and can ride more quietly.

Fully featured adult bike helmet designed for safety and comfort

Dial Fit adjustment system for an easy, custom fit

Easy-to-adjust webbing strap for a comfortable fit under the chin

✅【SAFE AND RELIABLE】 Kids/Youth ATV Helmets make sure kids are safe, DOT safety standards. It has a great amount of padding and protection inside,which provides excellent layers of protection.

✅【SNUG AND COMFORTABLE】 Kids/Youth ATV Helmets are very comfortable and not too heavy for the kids. It is Great gifts or present for your daughter, son, grandson, granddaughter, child, kids and Grandchildren on Christmas Day, New Year, Birthday.

✅【MULTIPLE AIR VENTS DESIGN】Kids/Youth ATV Helmet has multiple air vents around the helmet to maximize air circulation, make fresh air keep entering the helmet, You can have a good riding experience. The optimized vent reduces the wind noise and can ride more quietly.

Dual-certified skate and bike helmet for toddlers and kids up to five years provides comfort and protection with ABS outer shell and EPS liner

Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older and ASTM F-1492 Skate safety standards

Includes two sets of washable Sweatsaver fit pads to customize fit; “Pinch Saver” padded chinstrap; adjustable Fit Dial system

STYLE & DESIGN – Designed after the tried and true classic bicycle helmet, low profile with great coverage in a variety of colors.

FIT SYSTEM - Our True Fit system for easy one-step adjustment every time you ride, it’s that simple.

PINCH GUARD – The patented Pinch Guard buckle ensures pinch-free buckling.

Features: Beautiful Glossy UV Protective Finished; Light Weight Extremely Durable Composite ABS Shell; Multi Ventilation Openings, Good Ventilation; Adjustable Sun Visor; Comfortable/Removable/Washable/Breathable Liner; Strong and Sturdy Double D-ring Lock Keep the Helmet Stay on Firmer and Securer.

DOT Certified: Meets or Exceeds FMVSS-218 and DOT Safety Standards, Providing Better Protection for Your Boys/Girls When Riding Off Road, Motocross, ATV and Participating Outdoor Sports.

A Variety of Different Fashion Pattern Designs: They are great for Youth Kids Dirt Bike, Off-road, Street Riding, ATV, Motocross etc, Absolutely a Sweet Birthday/Christmas/New Year Gifts or Present for Your Daughter, Son, Grandson, Granddaughter, Nephew and Niece or Daily Purchases.

【Kids Helmet for Multi-Sports 】Intended for：3-8 years old kids| Size: 18.9-21.3 inch (48cm-54cm)| Color:Black, Blue,Pink, Red, Green. Adjustable toddler helmet size to accompany kids' growth, It is a perfect gift for boys and girls.

【High Quality Durable Material】Our kids helmet is made of ABS and shock-absorbing EPS foam, Constitute multiple protection system, specially designed for multiple-sports head protection.

【Adjustment-Comfortable】This kids bike helmet has a special adjustment dial system & adjustable straps to ensure your children achieve a perfect and safe fit. And 11 individual air vents that will keep your kids Cool & Comfortable for fun when playing.

Youth Helmet Glove and Goggle combo The quality and price you expect from TYPHOON HELMETS. Typhoon Helmets is American owned and we've been in business selling high quality certified helmets for more than 10 years

PLEASE PLEASE measure for size, we cannot impress on you enough how important it is that you measure for the correct size. Each manufacturers sizing is different. Measure the circumference of the largest part of the child's head, (usually just above the eyebrows) in inches: Use a paper tape measure or a string and do not pull it too tight, loose like a hat would fit.

SIZE CHART Youth Small: 18 to 19, Youth Medium: 19 to 20, Youth Large: 20 to 21, Youth XL: 21 to 22. Head shapes can affect how a helmet fits, the size chart is meant to be a starting point.

HIGHLY ADJUSTABLE FROM TODDLER to CHILDREN SIZE - SAVES YOU MONEY ON BUYING A NEW HELMET IN LATER YEARS – Easily adjusts Vertically and Horizontally for a tighter and snugger fit due to its ADJUSTMENT SYSTEM with a FIT DIAL. It also includes two padded inserts: the preinstalled 10mm pads are for toddlers of 3, 4 & 5-year while the extra 5mm pads are more suitable for children of 5, 6, 7 respectively 8 years old.

COOL AND COMFORTABLE - Lightweight with an integrated visor and 14 vent holes for cooling air flow even in the middle of the summer! The soft straps are fully adjustable and the quick-release clip keeps the helmet securely in place without the risk of face scratches or abrasions.

VERY SAFE – This cycling helmet features shock-absorbing EPS (expanded polystyrene) shell and fitted design to reduce your child risk of injury while biking on or off road!

NOTE: Sizing on this helmet runs small, please measure your head and compare with size chart for accurate sizing

EPS foam liner conforms to your shape for superior fit. Removable, washable helmet liner

2lbs. 2oz., 13 convenient air flow vents

AVAILABLE IN TWO SIZES: Small (18.5-20.5 in) and medium (20.5-22 in)

ADJUSTABLE-FIT DIAL allows this kid & toddler helmet to grow with your child

14 VENTS to keep your little one cool, even on hot days

STYLE & DESIGN - Designed after the tried and true classic bicycle helmet, low profile with great coverage in a variety of colors.

FIT SYSTEM - Features our True Fit system for easy one step adjustment every time you ride, it's that simple!

PINCH GUARD - The patented Pinch Guard buckles ensures pinch free buckling.

💝 IMPACT RESISTANCE: XJD toddler helmet combines a super strong injection molded outer shell and a protective EPS foam inner shell.

💝 HEAD SIZE: X-Small: 18.11-20.08 inch(46-51 cm), suit for 1-5 years old toddler; Small: 20.47 - 22.05 inch (52–56 cm), suit for 5-8 years old kids. We offer two different sizes of toddler helmet in order to give a comfy fit for kids.(Use a string and tape measure to measure your child’s head before order)

💝 SAFE AND COMFORT: XJD kids bike helmet equipped with 14 air vents, integrated bug mesh in the front vents that will keep your little rider comfortable of exercise, reduce sweating. The button closure is easy to open and close. It's covered in soft velcro padding that's comfortable for little chins

♕MATERIAL - DOT Safety Standard, Beautiful glossy UV protective finished, Light weight but extremely durable composite shell, keeps your kids safe and comfy while riding!

♕INTERIOR - Heavily cushioned, breathable and very comfortable interior, Removable and washable padding, well vented all purpose product for everywhere you ride in summer or winter

♕FUN RIDES AND GIFTS - Various interesting and fashion patterns design makes this helmet funny and cool; Great for youth kids dirt bike, off-road, street riding, etc, absolutely a sweet birthday/Christmas gift for children

DURABLE - Built for both comfort and impact resistance with REINFORCED ABS SHELL & THICKENED SHOCK-ABSORBING EPS CORE.

EXTRA REMOVABLE LINING - Skateboard helmet with two removable liner for different head sizes and easy to wash the sweat away.

A HELMET for MULTI-SPORT - Smooth Ventilation System helps to protect and enjoy SKATING, CYCLING, BMX, MTB and etc. Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older

SAFETY FIRST. This Kid's Sport Helmet has undergone intensive safety tests. It fully complies with CPSC 16 CFR Part 1203 safety standards. Thick EPS foam liner underneath absorbs the shock of a collision, and avoid jerking kid’s neck.

LIGHT WEIGHT. Super light weight - approximately 8.1 oz, without sacrificing safety, you won’t feel tired after hours of riding & cycling.

ADJUSTABLE FIT & COMFORTABLE. Adjustment dial system & adjustable straps. Two sizes available Size range: S 18.8”-20.5” (48-52cm), M 19.7"-21.3" (50-54cm).

Helmet Size L (22.4/22.8 Inch), Glove Size L(3.9 Inch); Package Includes: One Adult MX Helmet + One Pair of MX Goggles + One Pair of MX Gloves;

Light weight durable aerodynamic thermoplastic alloy shell;

Heavily cushioned and comfortable interior;

Its Rugged ABS Shell and shock-absorbing EPS foam effectively reduce the impact of any potential falls, providing essential protection to keep wearer safe from bumps and bruises. Complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for Persons Age 5 and Older.

3 sizes, Small (51-54 cm/ 20.0-21.3 in.) for baby toddler and children. Medium (55-58 cm/ 21.6-22.9 in.) for youth teenager and adults. Large (59-61 cm/ 23.2-24.0 in.) for adults. Various colors for men, women, boys, girls and babies. Please choose the helmet size according to the head circumference.

This classic bike & skateboard helmet is perfect for a variety of outdoor activities, including biking, skateboarding, roller skating, scooter rollerblade, longboard, hoverboard.

Complies with the U.S. Safety Standard. It is made of sturdy PC shell and high quality EPS foam, providing more protection for the cyclist.

2 sizes are available: L, 58-61 cm (22.8-24.0 inch) for adult; M, 54-58 cm (21.3-22.8 inch) for kids age 5 and older. Please choosing the helmet size according to the head circumference.

The adjustable dial and strap can be easily adjusted to achieve a custom fit. Besides, there is a insect net attached on the front of the helmet. Suitable for road / mountain cycling and other biking activities.

Recommended for ages 5-8, but will fit most heads measuring 50-54 cm

Always take a head measurement. Head sizes and shapes can vary, even with in an age range. Using a helmet that doesn't fit can be dangerous.

Large TPR snout and dorsal fin and radical printed graphics

FUSION IN-MOLDING POLYCARBONATE SHELL AND PROGRESSIVE LAYERING - A process pioneered by Bell bonds the helmet's outer shell to the EPS foam liner to create a sturdier helmet. The process of engineering a helmet liner with variable EPS foam densities to better manage the transfer of energies after some impacts.

FLEX SPHERICAL+MIPS AND WRAPAROUND CHIN BAR - Flex Spherical enhances our ability to address high-speed impacts, low-speed impacts, as well as rotational impacts. Think of it as comprehensive protection, with the added bonus of being able to design better helmet ventilation. A removable protective chin bar, designed for trail riding adaptability. No tools required. Warning: all chin bars have limits, and serious injury or death can occur. Read the owners manual carefully before using your helmet

X-STATIC AND XT2 PADDING, SWEAT GUIDE AND FLOAT FIT DH W/ FIDLOCK BUCKLE - Quick-drying materials, woven with real silver fibers. Sweat Guide pad design pulls moisture away from the brow pad and away from eyewear. A comfortable and secure fit system featuring an easy-to-turn rubber overmolded dial for adjustments.

MARKET-LEADING PROTECTION: Engineered in Giro’s category-leading helmet test lab

MIPS: Utilizes the Multi-Directional Impact Protection System to redirect energy in a crash

RUGGED: In-mold construction

SAFETY - This PHZ. adult mountain helmet meets US & EU cycling standards.

ADJUSTABLE DIAL & STRAPS - The adjustable fit system for men and women. 2 sizes for choice, suggested head circumference: M (55-58CM), L (59-61CM)

INTEGRATED SAFETY REAR LIGHT - Mountain helmet with detachable USB rechargeable light. Best for night riding with 3 lighting modes, Steady, Flash and Wave.

CERTIFIED SAFETY. This helmet has undergone intensive safety tests. It fully complies with CPSC safety standards. The ABS hard shell and impact-absorbing EPS foam liner provide superior protection from the inside out.

VENTILATION. 12 vents strategically placed at front, top and back to maximize airflow and keep you cool even during intense activities.

SIZE ADJUSTABLE. Rotating the size adjustment dial, you can always get a snug fit no matter what your head shape is. Comes in 2 sizes, S/M for head circumference 21.25”-22.25” (54cm -57cm). L for head size 22.25”-23.75” (57cm -60cm). 2 sets of replacement pads provided for a custom fit.