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Giro introduces the top-of-the-line Ionos (pronounced eye-oh-nOs) road bike helmet.

The most beautiful and technologically advanced road cycling helmet Giro has ever created is now available! Born from three years of pro-level testing and development with cooling ventilation that's beyond compare, a comfortable fit and an inspired look that's sure to sure to turn heads - it's no wonder this helmet keeps flying off the shelves!
Ionos is the most technologically advanced road cycling helmet Giro has ever created. Our revolutionary in-mold composite sub-frame (I.C.S) provides the strength to support 21 of the largest vents ever carved into a helmet. These massive vents, coupled with an intricate network of internal exhaust ports, create a cooling system we call the Wind Tunnel ventilation. Ionos keeps riders like Grand Tour Triple Crown Champion Alberto Contador cool and comfortable all season long.

The Ionos helmet is the most technologically advanced road cycling helmet in Giro's lineup, with features to keep you cool and comfortable with it's massive vents and exhaust ports.

The Giro 2008 Ionos Road Helmet,Internal Channeled Ventilation
| Fit system: | Roc Loc 4 |
|---|---|
| In-mold construction: | Yes |
| Retention System: | Roc Loc 4 |
| Vents: | 21 |
| Visor: | No |
| Weight: | 275 grams |
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View other products from Giro classified in Cycling > Helmets. View all products from Giro.
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Sometimes, we can't be sure that the product is the same across the stores that offer its, so you may find the same product listed more then once on GearBuyer.com, we these list highly similar products below.
| Giro Ionos Cycling Helmet | $229.99 - $230.00 | |
| Giro Ionos Livestrong Helmet | $195.00 - $230.00 |
Sometimes brands make complementary products for the opposite gender that coordinate with this product, we also try to show these products below.
| Giro Ionos Cycling Helmet - Women's | $137.97 |
These are products that have been indicated being comparable to this product:
| Giro Atmos Helmet Cycling > Helmets | $105.00 - $175.00 | |
| Giro Stylus Cycling Helmet Cycling > Helmets | $50.97 - $85.00 |
This product is available in the following colors:
Click any color to show the product in that color
| Red / Black | Matte Black / Red | ||
| Black / Blue | Matte Black / White | ||
| Blue / White | Matte Light Blue / White | ||
| Discv Blue / Blk | Matte Titanium | ||
| Black / Carbon | White / Silver | ||
| Matte Black / Gold Checkers | |||
Use this chart to find which retailer offers this product in the size, color or other options that you desire. Click on the price to purchase.
| Color | Size | ||
|---|---|---|---|
| Small | Medium | Large | |
| Black / Blue | 134.93 | 134.93 | 134.93 |
| Blue / White | 134.93230.00 | 134.93230.00 | 230.00 |
| Discv Blue / Blk | 224.99 | ||
| Black / Carbon | 184.00230.00 | 184.00224.99230.00 | 184.00230.00 |
| Matte Black / Gold Checkers | 230.00 | 230.00 | 230.00 |
| Matte Black / Red | 230.00 | 230.00 | 230.00 |
| Matte Black / White | 134.93 | 134.93 | 134.93 |
| Matte Light Blue / White | 230.00 | 230.00 | 230.00 |
| Matte Titanium | 184.00230.00 | 184.00230.00 | 184.00230.00 |
| White / Silver | 184.00230.00 | 184.00230.00 | 184.00230.00 |
| Black / Magenta | 184.00 | 184.00 | 184.00 |
| Blue / Black | 184.00 | 184.00 | 184.00 |
| Red / Black | 134.93184.00 | 184.00 | 184.00224.99 |
| Titanium | 230.00 | ||
Al's Sports (2009) offers this product at $224.99, but does not provide any color/size information.
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Great helmet | |
| Rating: | ![]() |
| I use this helmet to ride with a couple of riding groups. It is lite and allows pretty good ventilation. It did take a little longer for the straps to be adjustable to my head. Otherwise, just like the other Giro helmets I have used in the past ... great. | |
| Dennis the adventurer at REI on 05/08/2009 | |
Lightweight protection | |
| Rating: | ![]() |
| Use this for commute and mountain biking. Lightweight, excellent ventilation, good vision (no visor). Ventilation made a difference as I have noticeably better endurance. If you are on your bike more than a couple times a week, this helmet is worth the extra $$$'s. | |
| mEgacAt13 at REI on 07/03/2008 | |
this helmet saved my life | |
| Rating: | ![]() |
| this helmet saved my life. since the foam cracked during my accident(by design for safety), i have retired it and purchased another ionos. stay safe out there, and wear your ionos! | |
| productnine at REI on 10/14/2008 | |
Great Helmet for a great sale price | |
| Rating: | ![]() |
| I bought this helmet for riding with my road buddies. It was everthing I have found Giro helmets to be. | |
| Dennis the adventurer at REI on 05/03/2009 | |
not worth extra money ... | |
| Rating: | ![]() |
| not any more lighter than the atmos. it is definitely not worth the money as there are really no major improvements over the atmos. ventilation is supposed to be better and helmet is said to be lighter - NOT TRUE. not much wrong with the helmet per se but just seriously not worth the money when the atmos is pretty much exactly the same for much less money. and seriously, when will Giro fix the problems with the back of helmet adjustment mechanism, every giro helmet i have had (and everyone i know) breaks after a good amount of use -- less than desirable to say the least | |
| lootnerhead at REI on 05/26/2009 | |
wow | |
| Rating: | ![]() |
| wow not any better than the Atmos... def not worth the price. not any lighter, not any more ventilated, fit was ehh.. just not any better. only thing that is higher is the price. dont get me wrong i swear by Giro. these lids have saved my life twice both in races. one was a Pneumo one of the best helmets ever made. the other was an Atmos THE greatest helmet ever made. i bought this to replace my Atmos and was somewhat disappointed. save the cash buy an Atmos you wont be dissapointed.. ride smart, be safe. | |
| andy9 at REI on 01/30/2009 | |