Prime ro10 pro road rear hubthe r010 disc brake rear road hub is the pinnacle of our range and features a superlight forged alloy 7075 hub body that has been cnc machined to reduce weight without compromising structural integrity a grease port has been added for home maintenance to prolong bearing life and reduce service intervals our hubs run on premium japanese sealed cartridge bearings for ultra low friction and superior bearing life comprising of two in the hub body and two in the freehub b