The axiom streamline road deluxe rear bike rack is specifically designed for use on road bikes the rack does not require braze on mounts or threaded dropouts axiom streamline road deluxe rear bike rack features patent pending design specifically for use on road bikes does not require braze on mounts or threaded dropouts rack is mounted 4cm behind the axle allowing for improved wheel clearance on bicycles with shorter chainstays specially designed hardware attaches to caliper bra