The Tubus Fly Stainless Steel Rear Rack fits fast road or cross bikes with narrow tires. It is a very clean fit with a single mounting strut that fastens to the hole in the brake bridge between the seat stays. It will also mount nicely to a road bike with caliper brakes – sharing the same mounting hole with the rear brake. It is very light weight and stable. This is a great rack for the minimalist who wants a rear rack, but needs to keep it light! On some racing bikes you may want to consult the manufacturer for an opinion on carrying a load on a rear rack.