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Giro Ionos Cycling Helmet 2014


Out of Stock
View Size Guide

Men's Size Guide

Ready to Wear Clothing
Numerical 1 2 3 4 5 6
UK 34 36 38 40 42 44
FR/IT/EU 44 46 48 50 52 54
UK/US Waist 28 30 32 34 36 38
Australia 84 87 90 93 96 99
Japan 5 7 9 11 13 15
Japan Waist 36 38 40 42 44 46
UK 29 30 32 34 36 38
EU 44 46 48 50 52 54
US 0 1 2 3 4 5
Collar UK 14.5 15 15.5 16 16.5 17
EU 37 38 39 40 41 42
IT 44 46 48 50 52 54
US 14.5 15 15.5 16 16.5 17
Chest UK 34 36 38 40 42 44
EU 44 46 48 50 52 54
US 34 36 38 40 42 44

This is a standardised guide to give you an idea of what size you will need, however some brands may vary from these conversions.


The most ventilated and technologically advanced Giro helmet. Features the new RocLoc5 retention system - a claimed 40% lighter than its predecessor but, according to Giro, is more durable with examples during testing withstanding more than 6500 test cycles or three years' riding with an average of three round trips per day. A proprietary in-mold composite sub-frame (I.C.S.) provides the strength to support 21 of the largest vents ever carved into a helmet making Ionos the coolest, best-ventilated helmet available. Perfect for keeping Grand Tour champions like Lance Armstrong and Alberto Contador cool on the hottest days.

Key Features:

  • 21 enormous Wind Tunnel vents and optimally placed internal exhaust channels maximize air flow.
  • 15 percent better ventilation than the class leading Atmos.
  • Includes a winter liner for cooler days.
  • Fantastic styling and exposed I.C.R. carbon fibre detailing.
  • A visible weave of composite called In-Mould Composite subframe, runs throughout the helmet liner and around the vents.
  • The use of composites in the sub-frame provides incredible structural support, impact dispersion and resistance to penetration.
  • X-Static fabric pads are woven with pure silver fibres and kill 100% of bacteria.
  • Inhibits growth of odour-causing bacteria and fungi within 4 hours after a ride!
  • RocLoc 5 fits like a glove allowing lateral and vertical adjustment.
  • Weight: 321g (Size Large - Manufacturer claimed).
  • Meets CE EN178 certification.

Helmets that are sold on Probikekit.com are certified with a European CE EN1078 standard. This is a European standard and although the helmet is perfectly safe to use, specific countries may have their own certification which is legally required if you intend to wear the helmet recreationally or in a competitive racing environment. If you are unsure, please check your specific country requirements and check with the manufacturer to see if the helmet has received any additional certification.

Product Details

  • Giro

Delivery & Returns

How long will it take to arrive?

Please check the stock availability notice on your item when placing your order. This item is: Sold out

Please remember to add postal time (2-3 working days) to obtain a complete estimate of delivery to your door.

How will I know it has been sent

You will receive an email to confirm when your item has been sent.

You can also check the status of your order and individual items by accessing your account details and following the prompts.

Please allow 10 working days from the shipping date of your order before notifying us of any late deliveries.

It may be advisable to check with your neighbors to see if your delivery has been left with them, check any places it could be left such as: garage, porch, or behind garbage cans if it was too big to fit through your mailbox. Contact your local post office to see if the item has been returned to the depot as undelivered and awaiting collection.

If I'm not completely happy with my item?

Please see our returns policy.

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Giro Ionos Cycling Helmet 2014

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Giro Ionos Cycling Helmet 2014