Truvativ Power Spline Bottom Bracket - Powerspline - BSA Threaded - 68-73mm - 118mm LongA tough bottom bracket that will go as hard as you. The PowerSpline has a heat treated chromoly 12 spline spindle to make sure it can go the distance with even the most demanding riders. Specs: BB Frame Interface: English BSA 68E 73mm, English BSA 68mm, English BSA 73mm Chainline: 46. 0mm, 48. 5mm, 51. 0mm Spindle Length: 108mm, 113mm, 118mm Crank BB Interface: Power Spline Weight: 363g (BSA 73mm, 113mm spindle)