ORIGINAL SHIMANO FRONT CHAINWHEEL, FC-TY501,
FOR REAR 6/7/8-SPEED, 170MM, 42X34X24T W/CHAIN GUARD, W/CRANK FIXING BOLT, BLACK OUTER RING MATERIAL Steel,- AXLE LENGTH OF BB D-NL,- THREADED BB SHELL WIDTH 68,73,- CRANK ARM FINISH Painted,- COMPATIBLE BB TYPE Square Taper,- MIDDLE RING MATERIAL Steel,- GEAR ARMS 4,- COMPATIBLE CHAIN HG/UG|for|8/7/6-speed,- SERIES Non-Series,- INNER RING MATERIAL Steel,- GENERATION TY501,- CRANK ARM LENGTH 165,-,170,175 CHAIN RING COMBINATION 48-38-28,-,42-34-24 CHAIN CASE COMPATIBLE X,- CRANK ARM MATERIAL Aluminum,-