The F Series fork features 990 mounts for mounting front brakes and is made from 41-Thermal heat treated chromoly.Integrated bearing race. Fork crown is notched for cable routing. 4mm thick dropouts. Lifetime replacement warranty. 32.17oz. Item Specifications: Steerer Tube Material, Steel, Steer Tube Diameter, 1-1/8", Defined Color, Black, Weight (oz), 32.2, Steerer Tube Length (mm), 166, Top Cap, 24x1.5mm, Wheel Size, 20", Offset (mm), 25, Crown Race, Integrated, Color, Black, Brake Type, U-brake, Material, Steel, Front Axle Type, 3/8",.