MEGAEXO BOTTOM BRACKET - Oversize Cartridge Bearings - Forged and CNC machined external cups - Alloy center sleeve w/ double o-ring seals - English threading - 68 and 73mm width (1.37 x 24T) - 140 grams Not sure which one you need? Try the FSA Easy BB Tool here; http://www.fsaeasybottombrackets.com/ FSA Part Numbers; 200-1867 200-1869 200-1893 200-1883 200-1969 200-3213 200-1890