This is extremely good value crank from the Shimano Tourney Series, with its translation and durability Ideal for MTB and trekking use. It has three chain rings for 6/7/8 speed chains and a solid square socket (inner bearing sold separately). The spool is also compatible with chain: Yes. ; Package Content: > TY501 crank with chain rings, without inner bearing > Use: Mountain Bike Features: – – Steel chain rings – Case Width – Side to Side: 68/73 mm Chain Rings – Number Chain Rings: 3 ; Gear Ratio: 48-38-28 teeth crank , axle Socket: Square ; Chain line: 47.5 mm Chain Guard ; Chain protection ring ; Chain guard compatible
