Bike Front Wheel Riser Block Stabilize Bike Turbo Support for Indoor Bicycle Trainers Plastic Moulded wheel rest for use with turbo traininer. Anti-Slipping design in the bottom;Protect your floor during training Fit with 95% size of bike except Beach Cruiser Sturdy molded plastic with no slip feet Keep the front wheel steady and the handlebars straight, allowing for hands-free cycle training