Sram: STOP AT NOTHINGFinally, a hub worthy of the X0 name. Built to roll over the toughest mountain terrain, the SRAM X0 Hub proves that being solid doesn't have to mean sluggish.DOUBLE TIME ratchet design gives you smooth 6.9-degree engagement?ƒ?'?†?ƒ"e; ??ƒ?' ? "e;??…°?ƒ"e; ?all while keeping everything light and steady. Super-precise SPEEDBALL bearings mean lower resistance, faster revolutions and no more time spent readjusting play.Go with what works. X0 Hubs can be customized perfectly to your ride.