Giro Hex Bike Helmet Size:M Single Adult Size 54cm -

Single Adult Size  54cm - 60

Shaft diameter: 14 mm

Low maintenance sealed bearing cartridge axle

Outfront mounting

Water-resistant

Giro Hex Bike Helmet Size:M Single Adult Size 54cm -The Hex combines rugged style and durability, with the coverage and ventilation you want on the trail. Its stocked with all the features you need for a day on the dirt, including the comfort and stability of Roc Loc 5 and our P. O. V. visor that doesnt require any tools for adjustment. Many riders swear its the best all mountain helmet for the money, hands down. Features POV adjustable visor w 15 vertical adjustment Construction In Mold polycarbonate