Wheels Manufacturing T47 Inboard Bottom Bracket - For 30mm Spindle, ABEC-3 Bearings, Fits Frames with 68mm-132mm BB

For use 30mm crank spindles in frames with T47 interface Fits 68mm - 132mm shell widths Enduro ABEC-3 sealed bearings are replaceable Grade 10 chromium steel balls, 52100 High Carbon Chromium Alloy Races provide smooth crank rotation Machined aluminum cups with durable anodized finish