Please see the accomapanying product photos that illustrate the T47 bottom bracket standard as well as the bb30 crankset spindle standard this BB is designed for. This T47 version puts the bearings inside the BB shell for cranks with shorter spindles.

Angular Contact stainless steel bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. All Enduro bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA.

This complete bottom bracket 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 our standard 52100 chromium steel used in most of our 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. Enduro Bearings also uses LLB type seals and CRC Marine Grease in these bearings to additionally water proof against the elements. We are so confident in the quality and performance of theses bearings, Enduro provides a three year anti-corrosion guarantee.