SRAM BB30 Classic bottom bracket cups (42 x 30 mm)

SRAM BB30 BB42-68/73-30 bearings are designed for frames built to the BB30 standard. Pressed directly into the bottom bracket shell, they work with oversized 30mm axles for a stiff and compact interface. This system reduces weight while maintaining good mechanical strength. The design promotes a narrower Q-factor thanks to closer crank arm spacing. The large-diameter bearings are designed for extended wear life. Compatible with 68mm or 73mm bottom bracket shells.