Helios Spherical Road Helmet Size:Small Axle Diameter (mm): 12

Axle Diameter (mm): 12

BB/Frame Interface: English

Premium internals: outboard Enduro cartridge bearing

Adapters available for 135x10mm

Helios Spherical Road Helmet Size:Small Axle Diameter (mm): 12The heart of the Helios extraordinary design and performance is Spherical Technology, which utilizes a ball and socket design powered by MIPS, the market leading brain protection system that can help to reduce rotational forces. Spherical Technology allows the helmets outer liner to rotate around the inner liner during a crash, and also allows Progressive Layering of the inner and outer liners to provide more comprehensive protection and performance.