• Made of ultra-light aluminum alloy and resistance-free ceramic bearing, ensuring high strength and long-term durability
• Easy to install and remove
• It is a great accessory for driving enthusiasts
• Applied to most bikes rear derailleur on the market

Specification:

• Material: aluminum alloy body + ceramic bearing
• Applicability: Suitable for 4/5/6mm diameter roller screw shaft
• Weight: 7.7g