The Knog Oi Bike Bell has garnered a pretty big buzz as of late, and it's easy to see why. With a standout design that tucks stealthily close to your bars, the Oi is a unique way to add some noise potential to your bike. Knog claims this bell sounds "like an angel playing a glockenspiel", and while we can't confirm any heavenly associations, we can say that this bell projects a bright, crisp, ear-pleasing sound while hovering cleanly around your handlebars. The small size Oi is compatible with 22. 2mm bars, while the large Oi fits bars ranging from 23. 8 up to 31. 8mm in diameter.