Wind resistance at its finest. Dual fan design offers truer, road like resistance and lasting durability. The only wind resistance trainer that provides coast down simulation, speed sensitive resistance and a precisionmachined roller to reduce tire wear. Its the ideal choice for the casual rider who demands more.Compatible with all bikes with 22 29 diameter wheels wheels with less than 22 outside diameter require small wheel adapter TRAN8200, which is sold separately. New resistance unit RU tension system eliminates bending of frames and L bolts from over tightening. New ergonomic touch points. Refreshed paint and graphics. New boxes act as POP and include bar coded serialization for better tracking of product.