This is the Giant Sport Bell. The addition of a bell makes any bike a little safer and a little more fun. On the road or on the trail, a bike bell is a good way to give pedestrians, hikers or other cyclists a heads up, and let them know you are close by. The Giant Sport bell is easy to install and takes up little space on your bars. No matter what bike you ride, this bell is sure to be a sweet addition to your favorite bike. Fits 20-32mm handlebar.