Campagnolo freewheel spare sprockets: letter G16t. DE14t, DE23t. B16t, B17t. A17t, A18t, A22t. Post date January 1, 1970 ← Friction double gear levers braze on, includes optional braze-on boss for top/centre of downtube aero style → Seatpost 2nd generation single bolt 26.2mm 180mm long