The Non-Drive side of the Optimized freecoaster was designed completely around grinding - Included is a completely integrated non-drive side plastic hub guard that easily slides over the existing cone to simpifly your installation experienceRedesigned and improved internal bushing resistance system for improved engagementCNC 6061 alloy hub shell14mm solid cro-mo male axle9T 1pc CNC cro-mo driverProprietary plastic non-drive side hub guard2 fsealed cartridge driver bearings, 2 sealed cartridge...