This thread-in solution allows you to fit your Shimano-type 24mm cranks into your BSA threaded bottom bracket shell without any hassle- Features Angular Contact, 440C stainless steel balls and races to provide long life and superior corrosion resistance in applications and environments that may be less than ideal- Though stainless steel has 20% less load capacity and is slightly softer than standard 52100 chromium steel used in most Enduro bearings, stainless steel is an excellent alternative for use in wet conditions, if you wash your bike often, or where sweat can be a problem- Uses LLB type seals and CRC Marine Grease in these bearings to additionally water proof against the elements- Three year anti-corrosion guarantee