Thule's ThruRide 9mm Skewer Accessory Kit is a simple tool for a simple job. It slides through the fork mount head on your Thule 535 ThruRide sled in order to lock your 9mm quick-release dropout fork into place. Your road bike may not be as heavy as your thru-axle enduro sled, but that doesn't mean it won't benefit from the same level of security. Since the lock is on the quick-release lever itself, installation of both the ThruRide and your bike is simple and intuitive.