Go By Bike
Planet Earth is our home and our responsibility – we must do our part to preserve it. Learn how you can join the #GoByBike movement and help make a difference in the future of our planet and all who call it home.
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How-to content
Wondering how to properly fit that new helmet you just got? Need some tips on how to ride with your kids? How about ways to be more visible to cars? We've got that and a whole load more!
Learn moreCulture
Trek culture is who we are, what matters to us and what we do as a brand. Take a look behind the scenes at Trek’s global headquarters.
Read moreResponsibility
There's a lot more to Trek than making the world's best bikes and cycling gear. Learn more about everything Trek is doing to make the cycling space safer and more inclusive, plus a whole lot more fun.
Read moreProduct features
A simple, clean aesthetic
Solstice looks good wherever you wear it – road to trail and anywhere in-between.
Added versatility
A removable visor adds customisable style and provides additional sun protection.
Extended coverage
Added head coverage provides extra peace of mind for rides to school, the park or on the trail.
Max airflow
Large vents and recessed channelling maximise airflow to keep you cool on hot days.
Simple and secure fit
The Trek Headmaster three-fit system provides simple and secure adjustability.
Soft, comfortable pads
Soft, comfortable pads wick moisture and are easy to wash after a full day of fun.
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 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 | 51-58 cm | 55-61 cm |
| Fit system | Headmaster 3 | Headmaster 3 |
| Pad material | Moisture wicking pads | Moisture wicking pads |
| Buckle type | Standard buckle | Standard buckle |
| Includes | Crash Replacement Guarantee | Crash Replacement Guarantee |
| Weight | 295g | 325g |