PROPER SELECT UNIVERSAL REAR ULTRAMID NYLON DRIVE SIDE HUBGUARD.Hubguards protect your hub and spokes from grind damage and help to maintain a consistent grind, especially over kinks.Our driveside hubguards are CNC’d from Ultramid® nylon and have Heat-treated 4140 chromoly hardware. This guard will fit all known 9t hubs including 10mm axle and 14mm axle with 10mm bolts (such as the Odyssey Clutch).The guard sits between your cones and the inside of the drop out of your frame. The hub bolts the onto the guard inner which has a unique hex junction and therefore the guard cannot turn. Clamping onto a solid area also means that the wheelslip associated with inferior guards is eliminated. Our guard is also much smaller than other popular guards but covers all pegs.