The beautiful Sport Return idler is a wonderfully functional idler very similar to Terracycle's Elite Series Return idlers but in a more economical package. The same urethane band gives years of service with almost no wear. These idlers are durable, quiet and will improve most drivetrains when replacing hard plastic rollers that are stock on so many recumbents. ABEC series bearing, ballistic nylon side plates are beautiful and durable. We generally recommend this idler for return side chains only and suggest our power idler for the power side chain for optimal performance and longevity.