NECO B920AL JIS 103mm square taper Track bottom bracket with alloy side caps:
- Material: Steel body, alloy side caps, 10B21 spindle
- Fitment: 68mm BSA English thread 1.37″x24T
- Spindle Length: 103mm (super-narrow Q for Track bikes)
- Weight: 250g
- Crank bolts not included
- Torque BB cups to 35-50Nm
More install info here.
