Being into mountain biking isn&';t just about buying a mountain bike and heading to your local trails. There are tons of intricacies; everything from knowing how to handle a mountain bike to knowing what gear you need isn&';t something you learn in just one go. But every mountain biker, inexperienced and pro rider alike, can use the Timber Mountain Bike Bell - Bolt On. We think of it as more than just a bell, but as an easy way to be a responsible, safe trail rider. The Timber Mountain Bike is designed to alert other nearby trail users of your presence. It features an on/off switch to have the bell ring pleasantly as you ride the trail, or silenced when not needed. The Timber Mountain Bike Bell - Bolt On uses a flexible nylon band that tightens with a 5 mm hex bolt. Use it with a 31.8 mm handlebar by the stem or the 22.2 mm shim included with the bell to mount it by your grips.