Just goes to show that paying top dollar for a brand name can sometimes backfire. Cycling Tips didn't seem all that impressed by it. Also, lots of people in the comments section with less than glowing reports about the Oi bell. I have a friend who bought one and she has the sameissues (not loud enough and rings when going over bumps).
Knog claims that the Oi bell sounds “like an angel playing a glockenspiel”, and it does, indeed, have a friendly ding to it. But when it comes to using it outside – on the road or on the trail – the contained ring simply isn’t loud enough. I found that I had to be approaching quite close to someone before they would hear me ringing.
Both the Spurcycle and Knog Oi deserve praise for their innovative designs, but bells are still utilitarian items and function trumps style. While the Spurcycle bell sparks a kid-like joy about ringing a bell and is highly effective at alerting those around you, the Oi bell looks sleek, but falls disappointingly flat.