If you ride hard and often, the all new Timber Model Yew! is just what you’ve been asking for. It has the same sweet sound and performance of our existing bells, plus a handful of nifty improvements. It’s built stronger, and all parts are now completely modular, including the cable and clapper ringer system. If anything wears out or breaks, you can replace it quickly and easily.We’ve also added: A spring loaded piston to the on/off lever for smoother shifting A hinge pin in the bar clamp for easier mounting Now fits 35mm bars (includes shims for standard 31.8mm and 22.2mm bars) Moves easily between bikes Bands are made of UV resistant EPDM so they won't crack or degrade (QR version) Mounts with 3mm hex wrench (Bolt-on version). If you use your bell on most rides, we recommend the bolt-on model over the quick release, as it mounts most firmly to the bars. If you want to be able to quickly remove or install your bell, or move it from bike to bike, we recommend the quick release over the bolt-on model.