Steel bottom bracket shells - ISO threaded - 69mm, 74mm, 101mm

sku # BBS-ISO-69, BBS-ISO-74, BBS-ISO-101 Made from 4130 steel, these lightweight 38.1mm (outer diameter) ISO bicycle bottom bracket shells are available in 69mm, 74mm, and 101mm. These BB shells are made with an extra 1mm of width ensuring sufficient material for facing both sides. At the end of the facing process, they will then be 68mm, 73mm, and 100mm respectively. Drive side can be identified by the slight gap/recess on the drive side before the threads begin. ISO aka BSA, BSC, BC, British, and Euro. Right and left threaded (ISO) 1.370" x 24tpi. 69mm - 118g 74mm - 128g 101mm - 178g Weights are based on representative samples. Actual weights may vary slightly. Imported.