Material: This bike derailleur pulley adopts quality aluminum alloy and ceramic material. It uses anti-rust and anti-corrosion materials to ensure long-term use, and resistant anodized machined bicycle wheel ensure normal working Performance: this bike guide roller pulley not only reduces drag and improves cycle efficiency but is also very durable Additional accessories: The bicycle rear derailleur use ceramic bearings, for center bolt derailleurs which protect the bike. These pulleys run on smooth ball bearings Compatibility: This bicycle derailleur accessories is compatible for most of rear derailleur on the market and adjust to 7/8/9/10 speed After-sales: If our bicycle rear derailleur pulley has any problems that do not meet your expectations, please feel free to contact use, will make it right

Anodized CNC machined bicycle wheel with fully rubber sealed bearing for center bolt derailleurs. Fits for most of rear derailleur on the market, support 7/8/9/10 speed.If you need it will be your best choice. Wish you a happy life!

Features:

1. It is made of CNC aluminum alloy, lightweight and durable.

2. Anti rust and corrosion resistant anodized.

3. Apply for most of rear derailleur on the market, support 7/8/9/10 speed.

Specifications:

Material: 7005 Aluminium Alloy

Components: Derailleurs

Structure: Ceramic Bearings

Color: Red/Black/Green/Blue/Silver/Golden

Size: 13T

Use: For 7/8/9/10 speed

Diameter: 13T-50.5mm

Quantity: 2pcs

Fit For: For 4/5/6mm roller screw axis

Package Included:

2 Pcs Ceramic Bearings.