BSA / English threaded (68/73 mm)

A threaded bottom bracket shell, 1.37" x 24 tpi. The most reliable and quietest standard.

Notes

Broad compatibility with cranksets (Shimano 24 mm, SRAM DUB, etc.) via the correct cups. 68 mm road, 73 mm MTB.

Compatible with

Shimano 24 mm cranksets
SRAM DUB (BSA cups)
GXP

Questions about this standard

Source: Park Tool. Indicative data — always check the manufacturer's official specs.