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Giro Phase Bike Helmet

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The Giro Phase helmet is compact, cool and durable enough to handle even the most daunting climbs and rock-strewn ribbons of singletrack. It's also a super value in a low-profile helmet.

  • Acu Dial™ suspension offers an easy-to-adjust and supremely stable fit right out of the box
  • Highly tuned, 27-vent design provides superior cooling
  • Detachable visor provides added protection from sun, rain and the occasional branch
  • In-mold construction and internal reinforcement make this helmet tough

Please note: Giro products can only be shipped to the U.S., Canada and Mexico.


Item 780912

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Giro Phase Bike Helmet Specs
Best use
Mountain biking
20 - 21.75 / 21.75 - 23.25 / 23.25 - 24.75 inches
323 grams
Helmet style
Head circumference

Giro Phase Bike Helmet

Loading Ratings & Reviews...

Giro Phase Bike Helmetis rated4.0out of5by8.
Rated4out of5byfromNice Large HelmetFinally a helmet that fits my large head. It is large enough to fit over a winter skull cap. It adjusts to fit my bare head as well as with the winter skull cap.
Date published: 2013-10-09
Rated4out of5byfromGood MTB HelmetThis helmet is comfortable, lightweight, and breathes well. Everything I want for my daily commute. I'd buy again.
Date published: 2013-09-26
Rated4out of5byfromGood productComfortable fit with convenient adjustment on rear of helmet.
Date published: 2013-06-26
Rated3out of5byfromExcellent canister for one's brainI will use this lightweight helmet when the dollar collapses and my neighbors try to breach my stronghold
Date published: 2013-06-19
Rated4out of5byfromGood productPretty good product for the price. I wish it was a little lighter, and more breathable. Some parts of the head trap heat, mostly the front.
Date published: 2013-04-03
Rated5out of5byfromHigh quality, very durable product!I use my Giro Phase Helmet for trail mountain biking. The detachable visor does add great protection from the sun. Sunglasses and earphones work great with it. There are no issues with fit. I would highly recommend this product to any recreational cyclist! I am 100% satisfied with this product!
Date published: 2013-02-27
Rated4out of5byfromGreat fitThis was the most comfortable helmet under $100 that I tried on in the store. It just fit my head well with no areas too loose or too tight. One thing I really like is that you can take the visor on and off really easily. I like wearing the visor while mountain biking for protection from branches and whatnot but don't like it for commuting on road so I just snap it off in half a second! The helmet looks great with visor on or off, you can't really tell it's supposed to have a visor when you take it off. I agree with some other reviewers that it's not quite as breathable as it would appear from all of the vents but it's much better than the cheap helmets. I've worn a heavy duty mountain bike light on top of the helmet and having all of the vents really helps for being able to position the light in the right spot so it's not too far forward or backward.
Date published: 2013-01-30
Rated4out of5byfromNice fit and room for sunglassesmake sure it fits your head properly - some folks have oval heads and others more elongated. Mine is oval and it fits great. get the straps adjusted properly for good fit that keeps helmet from dropping down into your vision. Play with extra pads. haven't tried with GoPro on top, yet. We'll see how it carries the extra weight
Date published: 2013-01-24

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