The knog oi classic bell bike bells generally look amp sound a bit ugly but why what if they looked sexy amp sounded like an angel playing a glockenspiel knog oi classic bell features size small bell fits bars 222mm diameter large bell fits bars 238mm 318mm how to measure your handlebars weight small 18g large 28g materials aluminium with nylon mount amp acctuator bike attachment nylon clamp with hex screw to secure bell to your bike what