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Bell Stratus MIPS Helmet
Sale $104.96 - $149.95

Item # BEL00BN

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  • Select options
  • Goss Retina Sear/Black, S ($149.95)
  • Matte Red/Black, S ($104.96)
  • Goss Retina Sear/Black, M ($149.95)
  • Goss Retina Sear/Black, L ($149.95)
  • Matte Force Blue/White, S ($104.96)
  • Matte/Gloss Red/Black, S ($149.95)
  • Matte/Gloss Red/Black, M ($149.95)
  • Matte/Gloss Red/Black, L ($149.95)
  • Matte Black, S ($149.95)
  • Matte/Gloss Smoke/Gunmetal/Tropic, S ($149.95)
  • Matte Black, M ($149.95)
  • Matte/Gloss Smoke/Gunmetal/Tropic, M ($149.95)
  • Matte/Gloss Smoke/Gunmetal/Tropic, L ($149.95)
  • Matte White/Silver Reflective, S ($149.95)
  • Matte/Gloss Plum/Pear/Black, M ($149.95)
  • Matte White/Silver Reflective, M ($149.95)
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Item # BEL00BN


In the clouds.

The videos of an angry peloton delaying race starts in protest of helmet rules seem a little ridiculous now, but we're sure the reaction would have been different had Bell's Stratus MIPS Helmet been around back then. Its lightweight and cooling design borrows inspiration from the top-tier Zephyr and incorporates MIPS technology for an appropriately cloud-like personality that nearly disappears from notice during rides. You'll kit up quickly with easy, multi-directional adjustability and comfort that lets you focus on the snacks in your pocket and the road ahead.

When the weather warms up and caps are collecting dust at home, the durable shell's massive vents and matrix of air channels collaborate to regulate temperature with cooling breezes across your dome. All that airflow won't slow you down though, as the Stratus' streamlined shell shape is well suited for weekend races and long, scenic adventures alike.

  • Stay cool with this streamlined helmet
  • MIPS technology reduces rotational force in certain crashes
  • Durable in-mold shell dissipates force from direct impacts
  • Aerodynamic shell shaping reduces drag
  • Multiple vents keep air moving consistently as you ride
  • No-twist side straps stay securely in place
  • Float Fit dial allows for lateral and vertical fit adjustments

Tech Specs

Shell Material:
in-mold polycarbonate
Impact Foam:
18 vents
Fit Adjustment:
Float Fit
CPSC Bicycle, CE EN1078
Claimed Weight:
Recommended Use:
road cycling
Manufacturer Warranty:
1 year

Size Chart


Head Circumference  20.5 - 22in
(52 - 56cm)
21.625 - 23.25in
(55 - 59cm)
22.875 - 24.375in
(58 - 62cm)
24 - 25.625in
(61 - 65cm)
21.25 - 24in
(54 - 61cm)
Reflex, Segment
Head Circumference  20.125 - 21.625in
(51 - 55cm)
21.625 - 23.25in
(56 - 59cm)
23.25 - 24.25in
(59 - 61.5cm)
Head Circumference  20.5 - 21.25in
21.625 - 22.5in
22.875 - 23.625in
Full-9, Transfer-9
Head Circumfernce 20.125 - 20.875in
(51 - 53cm)
20.875 - 21.625in
(53 - 55cm)
21.625 - 22.5in
(55 - 57cm)
22.5 - 23.25in
(57 - 59cm)
23.25 - 24in
(59 - 61cm)
24 - 24.75in
(61 - 63cm)
Head Circumference 19.75 - 22.5in
(50 - 57cm)
21.25 - 24in
(54 - 61cm)
How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

Reviews & Community


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Chin strap failed

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Large

The first time I used this helmet the chin strap fell apart. When I attempted to adjust the strap to tighten the male half of the bucket fell off the strap. After searching for 10 or 15 minutes along the road but unable to locate.
It more than 30 days since I purchased , so hopefully a local bike shop can replace the strap.

Avg. ride time: 0m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Excellent helmet

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

I love Bell helmet and I have been waiting for the zephyr and never got to the store and I chose the stratus a very light and comfortable helmet..

Excellent helmet

Great Helmet

  • Familiarity: I've put it through the wringer
  • Fit: True to size

I had originally ordered the Zephyr, which Bell couldn't deliver, but I needed a new helmet, so I settled with the Stratus. I am glad that I did. It is cooler, lighter and looks better (to me) than my prior Giro Aeon that I crashed. It fits really well, is comfortable and it's easy to adjust. All in all, just what I wanted in a helmet