Shimano FCM131 SIS triple chainset delivers precise and smooth shifting performance. Chainwheel incorporates chain pickup ridges, specially developed teeth profiles and guide ramps to assure fast and precise SIS shifting. 5, 6, 7, and 8 speed rear block compatible. Size : 170 mm cranks. Chainring sizes : 24, 34, 42 teeth. For use with square taper bottom brackets. Silver crank arm with black chainrings.
