Key Features - 10, 11 and 12-speed compatible - Sealed stainless Steel cartridge bearings - Hub shell machined from a single forged aluminum billet - Standard 6 bolt disc fitting - 4 Pawl ratchet system with 44 tooth engagement (8.2 deg) - Larger spoke flange to enable stiffer wheel builds - Unsurpassed reliability - Available in 170/177 and 190/197mm widths (specific hub shells)