Giro unveil new Aeon helmet

Like an Ionos but two-thirds the weight? We're interested...

by Dave Atkinson   April 2, 2011  


Tomorrow at the Tour of Flanders Giro will launch a new helmet on an unsuspecting world. The Aeon is designed to combine the ventiliation and fit of their Ionos helmet with the low weight of their Prolight model, currently the lightest CPSC certified helmet currently available. Riders from Garmin Cervelo, Rabobank and Radio Shack will be sporting the new lid as they tackle one of the toughest classics and it will be available to the public in June of this year.

The Aeon purportedly tips the scales at 189g for a size M, which is almost on a par with the Prolight. The Prolight's simple elasticated retention system was always a bit of a love-it-or-hate-it affair, depending on your head, whereas the Aeon features the latest RocLoc 5 fit system as featured on Giro's other top-end lids.

It also borrows the SL Roll Cage technology from the Ionos lid, essentially a hard thermoformed skeleton within the low-density foam that allows for big vents whilst keeping the helmet's structural integrity. It's not an idea unique to Giro but they were an early adopter, and this new incarnation of the system is a claimed 49% lighter, which along with ultra slimline webbing straps goes some way to explaining the fact that the Aeon is 100g lighter than the Ionos.

“After 25 years of continuous refinement, it isn’t easy to make significant leaps in performance without compromising features,” said Greg Shapleigh, Senior Vice President for Giro and Easton Cycling. “But we took the leading attributes of our best helmets and applied our best technologies and ideas about design, and optimized every component." Given that at first look Giro appear to have been able to cram all of the technology of a lid like the excellent Ionos into a package two-thirds the weight, the Aeon is certainly some achievent. When it hits the shelves in June there'll be eight colour schemes to choose from, including 3 limited editions: World Champion, Garmin‐Cervélo, and Rabobank. Don't expect much change out of two hundred quid though...

5 user comments

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OK but can you tell me when the last time was that you noticed the weight of your head? Sometimes weight saving has other avenues than just affecting speed. For me one of the things that can get tired and aching on long rides is my neck. Saving weight seems to me to be a good way to minimise discomfort or extend the period before discomfort sets in.

bikeandy61's picture

posted by bikeandy61 [495 posts]
2nd April 2011 - 13:54


100g sounds like a big improvement, but it is only about 2% of the weight of a human head (don't ask me how I know) so if I were really performance-orientated, I'd buy a 50 quid helmet and use the other 150 quid on coaching, or put it towards a spring training camp. If I had a consumerist itch to scratch, I'd buy equipment that really benefits from low weight (wheels, chainset, pedals, etc.)

posted by handlebarcam [545 posts]
2nd April 2011 - 13:55


If you're worried about performance, I'd recommend not wearing a helmet. The aerodynamic disadvantage of a helmet has got to be more significant than its weight.

two wheels good; four wheels bad

posted by cat1commuter [1449 posts]
2nd April 2011 - 14:42


At $250 it better be made made better than most Giros! Guess they'll charge extra for 'limited editions' as well.

Make mine an Italian with Campagnolo on the side

posted by monty dog [433 posts]
3rd April 2011 - 15:46


Shame it doesn't have the same retention system as the Prolight - for my money the Prolight's is the most comfortable system I've worn. And with regards to reducing helmet weight by 100g+ - it's definitely worthwhile. Try going back to a 300g helmet after a 180 and you'll feel the difference immediately. Faster? No, merely more comfortable. What's wrong with that?

simonmb's picture

posted by simonmb [360 posts]
4th April 2011 - 19:54