We’ll make this a great experience
It’s our mission to provide you with world-class hospitality every time you visit us online or in-store. We’ll always take care of you. It’s the Trek way.
Crash Replacement Guarantee
With our Crash Replacement Guarantee, we will provide you with a free replacement helmet if it is involved in a crash within the first year of ownership. Simply contact us or your local retailer with the crashed helmet, original sales receipt, details of the incident, and a return address for your replacement.
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All your favorites, all in one place
Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.
Shop all gearHow to ride safer
Want to do more than wear a helmet? Check out this guide to riding safer.
Learn moreHow to clean your bike helmet
To ensure your bike helmet looks and performs its best, it's important to properly clean and care for it. Check out our simple guide to learn how to maintain your bike helmet. It's easy to do and takes little time!
Read moreProduct features
Mips Brain Protection System
Created through years of research, Mips is designed to accentuate the brain’s own ability to protect itself and can provide better protection from angled impacts.
Fidlock magnetic buckle
A Fidlock magnetic buckle fastens effortlessly for a quick, secure, fit. Simply move the two ends close to each other and watch as they magically connect.
One-handed adjustability
The Headmaster fit system allows for intuitive, one-handed micro-adjustments, providing a precise and comfortable fit.
Fresh pads
Soft, comfortable, moisture-wicking pads provide instant and maintained comfort and are also removable for cleaning.
Reflective elements
Reflective elements on the back of the helmet offer enhanced visibility when riding in lowlight conditions.
Helmet buyers guide
Not sure which helmet is right for you? Check out our helmet buyer's guide to learn everything you need to know about bike helmets.
See the guide30-Day Unconditional Guarantee
If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
Learn moreCrash Replacement Guarantee
With our Crash Replacement Guarantee, we will provide you with a free replacement helmet if it is involved in a crash within the first year of ownership. Simply contact us or your local retailer with the crashed helmet, original sales receipt, details of the incident, and a return address for your replacement.
Learn moreOur helmets build the future
$1 from the sale of every Bontrager helmet in North America supports PeopleForBikes, which provides guidance, a rating system, a leadership conference, and professional support for transforming cities throughout the United States in the ongoing effort of becoming a bicycle friendly nation.
Learn moreHelmet Fit and Sizing
For your helmet to do its job, it's important that it's sized properly and fits well. Reference our sizing guide at the link below to find your ideal size and see how Bontrager helmets are intended to fit.
Learn more| Size | S/M | M/L |
|---|---|---|
| Circumference | 51-58cm | 55-61cm |
| Fit system | Headmaster II | Headmaster II |
| Pad material | Moisture wicking pads | Moisture wicking pads |
| Buckle type | Fidlock buckle | Fidlock buckle |
| Includes | Crash Replacement Guarantee | Crash Replacement Guarantee |
| Weight | 335g | 375g |