Forged Alloy High polished anodized cranks Equipped with Compact Super Shifter chainrings Crank Length: 165,170,175mm Chainrings: 1/2"x3/32" 48-38-28T (Riveted)) Outer Chainring: Steel Silver painted Center/Inner Chainring: Steed Black Painted Speed: 7S/ 6S compatible B.B.Axle: 122.5mm(3N) Chain Line: 47.5mm