Giro Synthe Road Helmet 2017
The difference is clear in the wind tunnel - our extensive testing reveals that the Synthe is nearly as efficient as the fastest time trial helmets. But the Synthe's greatest attributes are comfort and ventilation. At it's heart you'll find our Roc Loc Air fit system. Micro adjustments allow you to custom tune tension and fore-aft tilt with one hand and a patented design suspends the helmet over the top of the skull, allowing airflow to pass freely over your head. Cooling power is further boosted by elaborate internal channeling and a series of massive vents; the Synthe sets a new bar for ventilation.
You no longer need to choose between aerodynamics and cooling power - with Synthe you get everything, all wrapped up in a compact and sleek silhouette.Key Features:
- Wind Tunnel-Aided Design for Aero Efficiency on the Road
- Integrated Aero Mesh Panels
- Eyewear Docking Ports X-Static Padding
- Featherweight Webbing with Slimline Buckle
- Construction: In-Mold polycarbonate shell with EPS liner
- Fit System: Roc Loc Air
- Ventilation: 19 vents, internal channeling
- Weight: 234g (CE Medium)
Occasionally, without notice, manufacturers change product design and/or specifications.
Giro Helmet Size Guide
How to measure your head size
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.
Giro cycling helmets are adjustable so will fit a range of head sizes. Once you know the circumference of your head, select an appropriate helmet size. For example, if your measurement is 57cm then a size M (55-59cm) or a One Size (54-61cm) will fit you.
Giro Men’s or Unisex Helmet Size Chart
Helmet Size |
Head Circumference cm |
One Size |
54 – 61 |
Small |
51 – 56 |
Medium |
55 – 59 |
Large |
59 - 63 |
Extra Large (selected models) |
61 - 65 |
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