Giro Synthe Road Helmet (Various Colours)
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Giro Synthe Road Helmet (Various Colours)

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  • Free UK Delivery when you spend £30.00
From £153.99 (FREE UK Delivery)
RRP: £199.99 You Save: £46.00 (23%)
Item out of Stock  |  Usually dispatched within 24 hours
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Cookstown Cycles are official stockists of Giro. Giro helmets are available to buy online at Cookstown Cycles. Browse the full selection and enjoy free delivery on UK orders over £30.

The Synthe™ is the pinnacle of road helmet design, combining the performance gains of aero efficiency and light weight with great cooling power to enhance rider comfort and efficiency. The compact form slips through the air with ease across multiple yaw and head angles, and offers greater cooling power than the Aeon.™ Key features include the Roc Loc® Air fit system with 2-way fit tuning and Aero Mesh Panels with a dedicated port for securely docking sunglasses as you ride.


  • Wind tunnel ventilation
  • Aero mesh panels
  • Eyewear docking ports
  • X-Static padding
  • Featherweight webbing with slimline buckle


  • Weight: 234g
  • In mold polycarbonate shell with EPS liner
  • Roc Loc Air fit system
  • 19 vents with internal channelling


  • To determine the correct helmet size, wrap a tape measure around the head, keeping the tape just above the ears and level front to back
  • Small: 51-55cm
  • Medium: 55-59cm
  • Large: 59-63cm

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We are committed to offering fast delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE within Ireland and the UK mainland on orders over £30. Click here to read our Delivery Policy.

If you're not completely satisfied with an item you may return it within 30 days of purchase. Click here to read our Returns Policy. 

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