Giro Aries Spherical Helmet - Matte Stone Size:L Wireless connection via Bluetooth LE

Wireless connection via Bluetooth LE or ANT

Not compatible with Shimano® Di2® E-Tube® EW-SD50 wires (nominally 5 mm OD connector) — use the Park Tool EWS-1

And the best bit

Weighing just 310g (400mm x 100mm)

Colour Black/High Polish

Giro Aries Spherical Helmet - Matte Stone Size:L Wireless connection via Bluetooth LEA helmet that feels like it isn't there: the all new Aries Spherical is like nothing before. Its sleeker form and lighter weight (only 270 grams in size medium, CE certification), deliver sensational comfort and cooling power. Spherical Technology, our ball and socket design powered by Mips, adds protection by redirecting energy away from the brain in certain impacts, and Progressive Layering with dual densities of Nanobead EPS foam adds more