Crankcase BSA Aluminum/Steel

With closed bearings / square axle.

Installation width of 68 mm.

Shaft length outside/outside measured in outside/outside. Delivered including 2 pcs. 6 edge bolts.

The crankcase itself is in steel and both threaded bowls are in aluminum.

Thread size for BSA 1.37 "x 24.

This type of crankcase fits most makes of pedal arms and crankset, as long as it is square, including SRAM, Shimano (Nexus, etc.), Campagnolo, Stronglight and Truvativ and more.