The pro tempo one piece aerobar extensions offer cyclists a range of hand positions and the arm rests provide a more comfortable feel for road riding these pro tempo aerobars are suitable for both 318 and 26mm bars and the arm rests have removable anatomic pads for versatility and convenience features easily adjustable alloy one piece aero extension bars with arm rests lightweight 6061 t6 alloy one piece aero extension bars suitable for 318 mm bars with adapters for 260 mm alloy a