Hope pro 4 dh mtb rear hubhope hubs have proven their reputation for bulletproof quality time and time again the hope pro 4 dh mtb rear hub features sealed stainless steel cartridge bearings and has been designed to suit a narrow range cassette features4 pawl ratchet with 44 tooth engagement 8 2shimano and sram compatibledesign enables maximum width of flanges to give stronger wheel buildssealed stainless steel cartridge bearingsmachined from forged 2014 t6 aluminium billetstandard 6 bolt d