ZTTO 2-Pack Bike Front Derailleur Conversion Ring Adapter (34.9mm to 31.8mm) - Compatible with Shimano - Perfect for Mountain & Road Bikes - Easy Installation for Smooth Gear Shifting

Features: This is a bike front derailleur ring, made of premium plastic material, sturdy and durable. Suitable for mountain bike, road bike, and other types of bikes. Lightweight, high strength, durable for long time use. 31.8MM diameter frame can be converted into 34.9MM frame. You can replace the old one, and provide the good performance for your bike. Specification: Material: Plastic Color: as picture shown Diameter: 3.7cm/1.5inch Package List: 2 x Front Derailleur Conversion Shim

This is a bike front derailleur ring, made of premium plastic material, sturdy and durable.

Suitable for mountain bike, road bike, and other types of bikes.

Lightweight, high strength, durable for long time use.

31.8MM diameter frame can be converted into 34.9MM frame.

You can replace the old one, and provide the good performance for your bike.