The new US Series Roto Racks will replace the original Roto Rack with a new and improved full stack. The new US Series is the ultimate in American technology with its roto molded tuff shell, front and rear lids, recessed heavy-duty twist latches, molded in handles, shock absorbing rubber feet and the recognizable patented deep Roto-X pattern for solid stackability. The unique molded-in unbendable valance and zinc plated steel threaded rail system make the US Series racks convenient to use and the most durable. Rear rack rails are available for all sizes of US Series racks. Covered by the You break it we replace it" Million Mile Guaranty.