BKS-0249 – T47-Internal, Threaded, stainless steel, Angular Contact Bearing Bottom Bracket for 86mm Shell, T47 Framesets and SRAM DUB Cranksets – 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. Finding the right bottom bracket solution for the ever-growing range of bicycles on the market is not always an easy task. At Enduro we currently offer over 50 different types of bottom brackets for various bottom bracket shell and crankset combinations in multiple price/performance levels. Enduro bearings offers threaded options for BSA, BSA 30, Italian and the robust T47 system. For press-fit bottom brackets we created the oft-copied, thread-together Torqtite bottom brackets as well as press-fit Delrin Cup options. We even offer flanged, double-row bearings to fit 30mm cranksets in BB86 shells!