Feedback Sports Omnium Over-Drive Rear Wheel Trainer - Fork Mount Progressive Resistance Red. The Omnium Over-Drive Rear Wheel Trainer keeps the rear wheel on the bike and offers a dynamic ride quality with progressive restance. Plus the precision rollers and internal progressive resistance design is so quiet you’ll never disrupt the neighbors. When you’re finished the elegant folding design hides it in its padded travel bag like it was never there.