Set up your bike trainer stand for effective use by locking your bike's rear-wheel axle in place using this Alpcour Bike Trainer Stand Skewer. Fitting most stands and compatible with most 4.92-to-6.57-inch diameter axles, it installs and removes easily thanks to a quick-release feature. Alpcour Bike Trainer Stand Skewer Silver - Bicycle Accessoriesories at Academy Sports