The PF30 road bottom bracket housings are 68 mm wide like BB30, but have a larger diameter, 46 mm, so that the bearings in the cups can fit inside the housing.This kit contains all the parts you need to install a crank of spindle Quarq or SRAM 24 / 22mm on a BB30 road or cyclocross bike.The package comes with two CeramicSpeed cups and bearings installed.There are two Standard and coated options.Both have super soft CeramicSpeed balls mounted on hardened steel races.The coatings have an additional feature:a metallic layer 3 microns thick over the races.This addition makes the races softer and harder, reducing endurance and increasing life.