Built for you, no matter where you roll. The Circuit is versatility-focused helmet ready to tackle every ride, from trail to tarmac, bike path to bike park. We design the Circuit with a streamlined profile that not only delivers a sleek aesthetic, but also improves aerodynamics—all the while dropping weight. The result? A helmet that’s ready to race your local crit on Saturday, and head to the singletrack for cross-country laps on Sunday.

What is WaveCel?

WaveCel is a collapsible cellular structure that lines the inside of your Bontrager helmet. It’s designed to be more effective than traditional foam helmets in protecting your head from injuries caused by certain cycling accidents.

It works like a crumple zone that helps absorb the force of an impact before it reaches your head. In order to protect your head and absorb the energy created by an angled impact, WaveCel is designed to go through a three-step change in material

Virginia Tech validated

All adult WaveCel helmets received the highest rating from Virginia Tech's third-party testing facility. This unbiased assessment proved Bontrager's WaveCel helmets to be among the highest level of protection available to cyclists with a 5-STAR rating.

A TIME Magazine Invention of the Year

Bontrager's breakthrough WaveCel helmet technology was named to TIME Magazine's list of 100 Best Inventions making the world better, smarter, and even a bit more fun.
From TIME ©2020 TIME USA LLC. All rights reserved. Used under license

Blendr seamlessly integrated front-and-rear-facing magnetic mounts offer a perch for your GoPro and Bontrager Daytime Running Lights, so you can see, be seen, and check the footage after your ride. The magnetic connection makes light installation simple, stays secure through rough and fast riding, and is tested for breakaway forces to make sure accessories detach in the event of a crash.

When it comes to design, we throw it all on the table. We put together the brightest minds to optimize engineering and study CFD analysis of airflow over time, so we can understand the velocity and trajectory of air particles in the wake of the helmet surface. That’s a whole lot of words to say: we find the shapes that help every rider go faster and feel smoother on the bike.

Comfort on every ride

Protection is priority, but it won’t get you very far without comfort. We pour hours of research into developing the best features that elevate fit, stay secure, and feel great for every rider on every ride.

Flat fit straps

Comfortable, lightweight FlatStrap semi-fixed dividers fit flat to your face on a single strap. They move fore-and-aft with plenty of adjustability, allowing you to achieve an ideal position under your chin for a fit that’s as comfortable as it is secure.

Soft and fresh

Moisture-wicking pads elevate comfort while pulling away perspiration on hot rides and when you’re putting in major efforts. At the end of the day the pads are easy to remove for washing, so you stay fresh ride after ride.

Fit for everyone

To get the most out of your protection, your helmet has to fit right. We offer a huge size range to fit any rider, and premium micro-adjustable BOA® Fit Systems that allow you to fine-tune comfort for a secure hold while you ride.

A better product for a better planet

Bontrager Circuit WaveCel Helmet is made with 50% post-consumer recycled polystyrene

Our 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.

Crash Replacement Guarantee

If your WaveCel helmet is impacted within the first year of ownership, we’ll replace it for free through the Bontrager Crash Replacement Guarantee.