Want to hone your bike handling skills, improve pedaling technique and increase efficiency when you're on the road? Then you'll love the simple and effective Elite Parabolic Rollers. Three thermoplastic drums simulate a realistic road feel and roll surprisingly quiet. Parabolic shape keeps the bike centered on the rollers while helping you develop better form and balance. Cylinders rotate on sealed bearings for a fast and smooth feel. Lightweight aluminum frame folds in half for convenient storage and transport.