MTB Crankset. MTB Crankset - 2x8/7-speed. The SHIMANO FC-M315-2 mountain bike crank delivers precise and reliable shifting for 2x7 and 2x8-speed drivetrains.
- Rear speeds: 8/7
- Compatible chain: HG 8/7/6-speed
- Chain line: 48.8 mm
- O.L.D.|Thru: 142 mm
- O.L.D.|QR/Nut: 135 mm
- Spider/Gear arms: 4
- Chainring combination: 36-22T
- Q-factor: 179.4 mm
- Recommended bottom bracket: Threaded (normal): BB-UN101
