Giant Rail Helmet Colour:Phantom Green a unique R&D program that

a unique R&D program that leverages real world wind data to create the most rapid

Mixed wheels on XS and S frames improve maneuverability and fit

It also enables the conversion of (small / large) transmission ratios

Constructed with a triple-density ergonomic design including a unique polymer compound and a layer of gel

Cyclocross or just getting from A to B

Giant Rail Helmet Colour:Phantom Green a unique R&D program thatGiant Rail Helmet Created with an all new head form for a more universal fit and the super slim Mips Air Node integrated rotational impact protection system, the third generation Rail is Giant's most comfortable and lightweight trail helmet yet. Boasting a four star safety rating from the world renowned Virginia Tech Helmet Safety lab, the Rail also features an accessible, four position, snap in height adjustment system, increased ventilation, and