BKSR-0286 - T47-Asymmetrical, Thread-In, 440C Stainless, Radial Bearing Bottom Bracket for BB386 type (30mm) spindles. sale Included with the kit are

Included with the kit are seals to protect the bearings from the elements and selection of spacers to allow you to precisely tune your chain-line

The 41mm by 16 tooth spline cup matches Maxhit BSA24 and all Shimano FC-25 BB cups

Si3N4 Ceramic balls reduce bearing wear and increase bearing life by eliminating steel on steel contact within the bearing

They keep the dirt out and the oil inside

This ABEC-3 radial bottom bracket bearing features black oxide-treated 52100 high-carbon chromium alloy races

BKSR-0286 - T47-Asymmetrical, Thread-In, 440C Stainless, Radial Bearing Bottom Bracket for BB386 type (30mm) spindles. sale Included with the kit areBKSR 0286 T47 Asymmetrical, Thread In, 440C Stainless Steel, Radial Bearing Bottom Bracket for BB386 type (30mm) spindles. 440C stainless steel bearings pressed into precision machined aluminum T47 cups that simply thread directly into the BB shell. The T47A (Asymmetrical) specification is a new thread in standard that has is similar in concept to BBRight (but with threads) that been used by a couple brands, including Cervelo and Factor. All Enduro