A bell with a beautiful tone like an angel playing a glockenspiel, but also a remarkable style and choice of materials that embodies a rider’s personality. 
The Small Oi fits 22.2mm bars e.g Mountain bike (near the grips), BMX & some old commuters.
The Large Oi fits 23.8 to 31.8mm bars e.g. drop bar road bikes and some cruiser / commuters.
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