31.8 mm

This Shimano Alpine front derailleur is a new out of the box item, an item that is a high-quality bike component compatible with various brands and types of bikes. The derailleur is designed for 18 and 21-speed systems and has a 31.8 mm clamp size utilizing a stainless-steel band clamp, making it easy to install and adjust. The derailleur can be used for double and triple chainrings, and has a bottom pull cable. Its weight is only 4 ounces, making it a lightweight and comfortable addition to your bike. This item is sleek looking part that is a reliable and quality part, and is a front derailleur that can be used for different bike types and styles.