Shimano Tiagra 4603 170mm Triple 30/39/50t Crankset Silver 10-speed Road crankset Two piece Hollowtech II w/ integrated 24mm OD BB spindle Anodized aluminum crankarms/SG-X alloy outer chainrings Chainline - 43.5mm (double) or 45mm (triple) Does not include Shimano SM-BB4600 BB Weights do not include BB