Compatible with current freehub bodies and rear spacing remains unchangedMachined aluminum spacers guarantee optimum spacing to ensure perfect alignment and shifting for the life of the transmission The two largest cog triplets are machined from a single piece of steel for maximum stiffness and energy transferSpecial surface treatment reduces friction, improving performance and reducing wear11-34t12sp11,12,13,14,15,16,17,19,22,25,29,34 SilverUPC/EAN/GTIN: 8053340453984