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How 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
Rally Mips Mountain Helmet
Performance-oriented mountain bike helmet with the added protection of Mips
Next level protection
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.
Dropping in
Extended coverage at the rear of the helmet not only looks good, it protects more of your head's sensitive areas so you can have the confidence to drop into any situation.
It happens
Get back on the bike as soon as possible with a free replacement for any helmet involved in a crash within the first year of ownership. Simply contact Bontrager or your local retailer.
30-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 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 | L |
|---|---|---|---|
| Circumference | 51-57cm | 54-60cm | 58-63cm |
| Fit system | Headmaster II | Headmaster II | Headmaster |
| Pad material | Moisture wicking pads | Moisture wicking pads | Woven Synthetic |
| Buckle type | Standard buckle | Standard buckle | -- |
| Includes | Crash Replacement Guarantee | Crash Replacement Guarantee | -- |
| Weight | 330g | 370g | 440g |