The threaded interface where our collets attach to the BRT-222 utilizes a British Standard Whitworth (BSW) 1/2"-12 thread specification
This ABEC-3 radial bottom bracket bearing features black oxide-treated 52100 high-carbon chromium alloy races
BKC-54115 - XD15 Ceramic-Hybrid
Enduro Zero Ceramic-Hybrid Bearings featuring Black-Oxide treated 52100 High-Carbon Chromium alloy races paired with Grade 5 Silicon-Nitride Ceramic Balls with 90% fill
where the bottom bracket bearings and cups are merged into single components
BKSR-0286 - T47-Asymmetrical, Thread-In, 440C Stainless, Radial Bearing Bottom Bracket for BB386 type (30mm) spindles. sale The threaded interface where ourBKSR 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