BKS-6054 - BSA Thread-In, Angular Contact, 440C Stainless Bottom Bracket for 30mm Cranksets (spindle length of 104mm or more) - Graphite Since these bearings are 15º

Since these bearings are 15º Angular Contact design

and XD15 Ceramic-Hybrid at the top of the line

The Enduro line of bearings are available in High-Carbon Chromium Steel

Bearing Bottom Bracket for BB386 Framesets and Shimano 24mm Cranksets

Weight - 30

BKS-6054 - BSA Thread-In, Angular Contact, 440C Stainless Bottom Bracket for 30mm Cranksets (spindle length of 104mm or more) - Graphite Since these bearings are 15ºBKS 6054 BSA Thread In, Angular Contact, stainless steel Bottom Bracket for 30mm Cranksets (current spindle length standard of 104mm or longer) You may find the following tools useful for installation and servicing: For bottom bracket installation: BBT 46x12 30 Pro Cup socket tool for 46mm x 12 spline bottom brackets and 30mm spindle cranksets BBT 036 Bottom Bracket Flat Wrench for 41mm x 16 spline and 46mm x 12 spline GR 009 Enduro MAX bearing grease