TOM Race Retro bicycle bell The Race Retro is an original vintage bicycle bell. This bicycle accessory has a diameter of 55 mm and is clearly audible. The color and design make the bell look vintage and stylish and you can make a good impression in traffic. The bicycle bell is easy to attach to any type of bicycle with a clip that can be attached to the handlebars. Specifications: Material: aluminum, steel Diameter: 55 mm Color: gold, silver Weight: 40 grams Clamp diameter: 22.2 mm