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
They keep the dirt out and the oil inside
The extended inner race eliminates the need for extra spacers to connect suspension linkages
where the bottom bracket bearings and cups are merged into single components
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