The Merritt Tension front hub guard is a universal style guard designed to protect the front hub flange and spokes from grind damage. The guard mounts to the hub using a unique coil spring design that wraps around the spokes and guard for a secure fit. Made from a lightweight plastic material that won't drag and slow you down during grinds. (0.8 oz) Inner Diameter: 34.5mm Outer Diameter: 81mm If you are having problems viewing the video above, try refreshing the page. If you are still having issues, update or try an alternate browser.