Bicycle bells are usually a little ugly. But why? What if they looked sexy and looked like an angel playing the glockenspiel? A bell with a beautiful tone, but also a remarkable style and a choice of materials that embody the personality of the driver. The small Oi fits 22.2mm bars e.g. ATVs (near handles), BMX and some old carriers. The large Oi fits bars from 23.8 to 31.8 mm e.g. Drop Bar road bikes and some cruiser/commuters. Please make sure you know where you are going to place the doorbell (handles or stems) before placing an order, as you may need a different size doorbell.