CHUDOU Bicycle Jockey Wheels,MTB Pulley Guide 11T/13T Rear Derailleur Aluminum Alloy Wheel Compatible with 4Mm/5Mm Axles for Mountain And Road Bikes(Purple,13T)

[Versatile CompatibilIty]: Suitable for mountain bikes, road bikes, and other Bicycles, this guide roller fits both 4mm and 5mm specifications, ensuring broad compatibility. [Premium Aluminum Alloy]: Made from high-quality aluminum alloy, this guide roller is lightweight and durable, offering a stylish appearance and long-lasting performance. [Multiple Color Options]: Available in black, red, blue, gold, and purple, allowing you to customize your bike to your personal style. [Lightweight Design]: Weighing only 11.6g for the 11T and 14.5g for the 13T, this guide roller reduces the overall weight of your bike, contributing to a smoother ride. Bike Accessoryrear Derailleur Pulley Is A Necessary Accessary For Your Bicycle. It Offers You A Better Cycling Experience.