• High strength aluminum alloy material, CNC processing, enhances the durability
• Bearing sealed bearings, waterproof and dustproof, durable performance
• The pulley wheel is easy to install and detach, a necessary replacement for fitness equipment

Specification: 

• Material: aluminum alloy body + metal bearing
• Process: CNC full hollow anodizing
• Applicable: 8/9/10/11 speed after 4/5/6mm screw hole, suitable for almost all mountain road rear derailleurs