Sleek, balanced and consistent. The Tiagra 4700 series provides serious entry-level riding performance with cascaded technology from DURA-ACE. Features: Optimal balance between stiffness and light weight Pedal harder and ride faster Enjoy fluid shifting across various riding conditions Crank Construction - 2-piece crank construction Cassette Compatibility - 10 Chain Compatibility - Series color Crank Arm Length - 165, 170, 172.5, 175 Chainrings - 52-36T/ 50-34T Bottom Bracket - BB-RS500 / BB-RS500-PB Chain Line - 150