Bontrager  Circuit MIPS Road Bike Helmet

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Whether your finish line is on the race course or at your front door, the Bontrager Circuit MIPS road bike helmet delivers the performance, comfort and protection you need for 2-wheeled adventures.

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Features

  • Rotational motion can cause brain injuries; with MIPS, a low-friction layer slides 10 to 15mm in all directions, reducing rotational motion to the brain during impact
  • Integrated Blendr mount lets you attach an action camera or Bontrager light accessory (not included)
  • Boa® closure system lets you easily secure and adjust your fit with just 1 hand
  • In-mold composite skeleton increases helmet integrity for larger vents and increased airflow
  • AgION antimicrobial pads wick moisture and inhibit the growth of odor-causing bacteria
  • LockDown dividers make helmet strap management clean and easy to adjust
  • Internal, recessed channels move airflow over your head to help you stay cool and dry
  • Bontrager offers a Crash Replacement Guarantee, providing free helmet replacement if involved in a crash within the first year of ownership

Imported.

To find your size, position a tape measure just above your ears and about 1 in. above your eyebrows. Keep the tape level to measure the circumference around the largest part of your head and then find the corresponding size in the Technical specs info.
View all Bontrager Road Bike Helmets

Technical Specs

Best Use

Road Cycling

Helmet Style

Road Bike

Helmet Construction

In-mold

Shell Material

Polycarbonate

Visor/Brim

No

Gender

Unisex

Reviews
22 reviews with an average rating of 4.5 out of 5 stars

Ratings Snapshot

Product Rating

14 out of 15 (93%) reviewers recommend this product

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Average Customer Ratings

Overall Fit Rating

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Most Helpful Favorable Review

5 reviews with an average rating of 4.0 out of 5 stars
Solid helmet with game changing mounts
Andrew
5 years ago
Good helmet. The light attachments are game changers for me. I commute in NYC so I’m all about visibility. The light-mounts offer the sleekest yet most functional way to add lights. MIPS is nice but standard nowadays.
Andrew
New York, NY
5 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 2.0 out of 5 stars
Good helmet w/fit issues
Alan
5 years ago
I upgraded to his helmet from a Bontrager Starvos for better visibility when commuting. The magnetic light/camera mounts are excellent and I'm happy with the shape of the helmet. However, I can't recommend it because the chin straps never stay in place. The loop the chin straps pass through at the back of your head offers no way to hold them in place; it's simply a pass through. So once you get the straps perfectly adjusted, they will have slid to a new position the next time you put it on. This occurs during very simple activities, such as carrying your helmet to the table or hanging it from your bike/lock at your destination.
Alan
Seattle, WA
7 people found this review helpful

Customer Images

Andrew
New York, NY
Rated 4.0 out of 5 stars

Solid helmet with game changing mounts

5 years ago

Good helmet. The light attachments are game changers for me. I commute in NYC so I’m all about visibility. The light-mounts offer the sleekest yet most functional way to add lights. MIPS is nice but standard nowadays.

Yes , I recommend this product
Helpful?
Alan
Seattle, WA
Rated 2.0 out of 5 stars

Good helmet w/fit issues

5 years ago

I upgraded to his helmet from a Bontrager Starvos for better visibility when commuting. The magnetic light/camera mounts are excellent and I'm happy with the shape of the helmet. However, I can't recommend it because the chin straps never stay in place. The loop the chin straps pass through at the back of your head offers no way to hold them in place; it's simply a pass through. So once you get the straps perfectly adjusted, they will have slid to a new position the next time you put it on. This occurs during very simple activities, such as carrying your helmet to the table or hanging it from your bike/lock at your destination.

Helpful?
Fireborday
White plains MD.
Rated 5.0 out of 5 stars

This Helmet saved my life. Period.

4 years ago

Got hit by a car today that ran a stop sign. Fell head on into the opposite lane. Luckily I had lots of layers on due to cold weather. No significant injuries.

Age:35–44
Yes , I recommend this product
Helpful?
Bret
Michigan (southeast)
Rated 5.0 out of 5 stars

Great value

5 years ago

Replaced old Giro Pneumo which is a nice helmet. This one is better. Feels like has better coverage and not feel like a mushroom cap. The pads, fit, comfort, weight (300g), and ventilation are all great and seems durable and I like the simple styling. You'd have to spend $100 more for better lighter helmet and only marginally. Yes the straps are fiddly to setup so take some time to dial in and then should be fine. Only gripe is front top sits lower and affects my field of vision some for mountain biking. Maybe I need to hold my head higher but I like that it has good coverage rather than perched on the top of my head.

Age:45–54
Yes , I recommend this product

Overall Fit Rating

Runs SmallRuns Large
Helpful?
Anonymous
Puyallup, WA
Rated 5.0 out of 5 stars

Great fit, with good ventilation

5 years ago

Fit was great. My head size was right on the boarder between Small and Medium, went with the Medium due to the easy size adjustment capability, don't regret it at all. Slips on well and tightens up snuggly with no wiggle and no pinching or pressure points. Good ventilation, so my head stays cool on hot rides. Haven't used the light attachments yet, but I do like the ability to add a light when I need or want to.

Yes , I recommend this product
Helpful?
Happy noggin
Central Oregon
Rated 5.0 out of 5 stars

It actually fits his noggin!

4 years ago

My husband has never had a bike helmet before because they didn't fit his head. But when he decided to start riding again, and with the purchase of a new bike (also from REI), we decided a helmet would be a good idea. It adjusted easily, fits well without squeezing his head, and he reports it is comfortable. Glad we made the decision to purchase this!

Age:55–64
Yes , I recommend this product

Overall Fit Rating

Runs SmallRuns Large
Helpful?
Jonathan
Rated 2.0 out of 5 stars

Good fit system but way too heavy

5 years ago

Very comfortable fit system but the helmet was just way too heavy for me.

No, I do not recommend this product

Overall Fit Rating

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Helpful?
BillC
Denver, CO
Rated 5.0 out of 5 stars

Comfortable

5 years ago

Comfortable to wear after getting the straps adjusted. That took a little fiddling. The dial adjustment is super convenient for getting things nice and snug every time. I'm taking it on faith that it'll do its job if I ever need it to.

Yes , I recommend this product
Helpful?
Howard J
Barrington, Il
Rated 5.0 out of 5 stars

Fits well, protects the big head

5 years ago

Fits my big head perfectly. Adjustable so in cold weather I can wear a wool beanie. Plenty of holes so that wearing is cool in warm weather. Great safety colors.

Yes , I recommend this product
Helpful?
Yogiyogi
Tiger, GA
Rated 5.0 out of 5 stars

Love the helmet!

4 years ago

I’ve worn it with complete comfort. I’ve attached a rear view mirror to it and have still had no problem with fit or comfort.

Yes , I recommend this product

Overall Fit Rating

Runs SmallRuns Large
Helpful?
1 - 10 of 22 Reviews

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