Tektro RX 5.0 Carbon Reverse Levers – 2018 The Tektro RX 5.0 Reverse Lever is available in black. RX 5.0 Fits bar ID of 19-21mm Requires mountain end brake cable Extension levers for aero type bars 136 grams. Posted in Bicycle Brake Levers, Bicycle Brake Parts, Bicycle Parts, Cycling, Outdoor Recreation, Sporting Goods