Hurricane components fork up riser qr the hurricane fork up riser is designed to adapt standard front forks shocks regular drop outs to fit racks with clearance problems such as disc brake calipers coming in contact with the rack as well as providing for easier installation of your bike onto the rack and better clearance between bikes the fork up riser installs easily on your fork before loading it onto your rack its easier then installing your front wheelonce installed on the fork just l