TruVativ Giga Pipe Team DH 68 / 68E / 73 x 128mm ISIS Bottom BracketISIS is a splined interface bottom bracket crank design used by Truvativ, FSA, Raceface and other brands. Aluminum cups require TruVativ or compatible installation tool Heat treated thick wall chromoly spindle handles the abuse of downhill riding Precision full complement sealed cartridge bearings M12 crank bolts included (unless noted) Product Specifics Defined Color: Black Bottom Bracket Shell I. D.: 1. 37 Spindle Length: 128 Spindle Interface Type: