These 9x100mm HUSKE Plugs snap into the HUSKE Fork Mount for transporting a bike with a 9x100mm quick release front hub (obviously). Molded from super-durable glass-filled nylon. Sold in pairs. Quick Release Axle included. 9x100mm hubs are the most common out there. New bikes, older bikes: if your front fork ends in horseshoe-shaped cutouts, these are the plugs for you.