370 Track Rear Hub, 120x24h Bolt On

- Classic track hub design with dependable cartridge bearings\n- Rear wheel hub offers a right-hand thread for the cog and a left-hand thread for the lock ring on both sides of the hub shell\n- By turning the wheel it can be changed between two gear ratios or between a track cog and a freewheel cog\n- DT Swiss spoke calculator: https://spokes-calculator.dtswiss.com/en/calculator