Fit & Design: Keeps your bike level with your trainer Adds stability to your training ride Provides a more natural feeling indoor ride Simply set on the floor and it will go perfectly under the front wheel of your bike Wide and solid enough for you to place your bike on it while avoiding rocking or moving Sturdier and more durable than ordinary plastic, not easy cracked For use with any rear wheel-mounted trainer Bicycle Tire Compatibility: 1.1 in. Made in the USA