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Giro Phase Bike Helmet

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  • 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

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Rated 3.9375/5 based on 16 reviews
Rated 2out of5
by fromPlastic inner carriage weak The inner carriage that the "micro adjuster" tightens is weak and mine broke after a few months of usage. I think the helmet overall looks pretty big on a normal sized head--I prefer helments that are smaller and tighter fitting. NOw that the inner plastic ring is broken it pokes into my head every time I wear it and I plan on returning it. Pretty shady for a 75 dollar helmet!
Date published: 2010-05-11
Rated 3out of5
by fromIt's OK... This helmet has a good fit, feels nice, and is definitely rugged, but it's heavy compared to others like the Bell Influx ($65) or Giro Hex ($90). The difference in weight is only about 30 grams, but it is pretty noticeable. I've used the Phase twice while mountain biking through shaded single track trails and each time my head felt very hot and sweaty. It touts having a lot of ventilation holes, but I can't say that they helped much because the padding in the helmet would be drenched with sweat. I'd recommend this helmet to anyone who isn't biking very hard since it can get pretty warm.
Date published: 2011-07-15
Rated 3out of5
by fromFunctionally Good, But..... Helmet works as it shoud- Fit is comfy, and secure. Visor does a great job keeping rain off my glasses. Just DO NOT look in the mirror. Very large-looking, and well, ugly. I ride solo in BFE so this doesn't really matter.
Date published: 2011-10-01
Rated 4out of5
by fromNice fit and room for sunglasses make 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
Rated 4out of5
by fromGood MTB Helmet This helmet is comfortable, lightweight, and breathes well. Everything I want for my daily commute. I'd buy again.
Date published: 2013-09-26
Rated 4out of5
by fromGood product Comfortable fit with convenient adjustment on rear of helmet.
Date published: 2013-06-26
Rated 4out of5
by fromNice Large Helmet Finally 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
Rated 4out of5
by fromgreat helment I used this helment on a 4 day mountain biking trip and i loved it. Very durable and lightweight
Date published: 2009-08-13

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