The topeak roadie pannier rx is a sleek and stylish rear rack for road bikes without seatstays or rack mounts the adjustable struts ensure a perfect fit key features installs easily with centre bolt clip and seatstay straps rx quicktrack system is compatible with rx trunkbag ex fits road tires up to 700 x 25c 6061 t6 hollow aluminiumengineering grade plastic weight 450g