FSA BSA Shell Steel Bearings Bottom Bracket

Replacement BB cupset for 19mm spindle mountain (NBD) cranksets AND mountain cranksets with pinch bolts on LH arm (Gamma Drive).

- Oversize stainless cartridge bearings
- Die cast then CNC machined alloy external cups
- Composite DI2 compatible adjustable center sleeve
- English thread, 68/73mm
- 115g

NBD = No Bolt Design (no pinch bolts in LH arm)