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.

Awesome free shipping options

All accessory orders over $49 ship to your home for free, and all accessory orders ship free to your local retailer for in-store pickup.

30-day Unconditional Guarantee

If for any reason you’re not 100% happy with your online order from trekbikes.com, you can return it in like-new condition within 30 days. No questions asked.

Learn more

ARCHIVED

2012 - 2023

Bontrager Bike Helmet Fit System - Headmaster II

Model 435930

Fit systems work hard to keep your helmet secure and to maximize safety.

No matter what happens, these original replacements will get them working like new.

Product details

Original replacement fit systems for your Bontrager helmet
Compatible with all Bontrager helmets with Headmaster I or II fit systems

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 more