The GX is cold-forged for high strength and light weight, loaded with trickle-down features and available with double or single rings. Integrated spindle design is light, strong and reliable. Fits 68 or 73mm bottom bracket shells. Anodized alloy chainrings with shift pins and ramps. Item Specifications: Color, Black, Spindle Interface Type, SRAM/Truvativ GXP, Pedal Spindle, 9/16", Chainring BCD, 104, Chainring BCD, 64, Rings, Bash/36/22, BB Included, No, Crank Intended Use, Mountain, Defined Color, Black, Crank Length (mm), 175, Drivetrain Speeds, 10, Number of Chainrings, Double, Chainline/Hub Compatibility, 135/142 MTB Hubs,.