Shimano RD-M5120/RD-M4120 13-tooth Plastic Jockey Wheels

Product Description

Product features

• Compatible pulley set for RD-M5120-SGS and RD-M4120-SGS rear derailleurs (DEORE M5120 / M4100 series).
• 13-tooth pulleys for improved chain tension management and quieter shifting.
• Made from high-quality plastic providing lightness and durability for off-road MTB use.
• Designed for 10 and 11-speed drivetrains, suitable for All Mountain MTB riding.
• Easy replacement to maintain shifting precision and smoothness.

Compatibility and application

This pulley set is specifically designed for Shimano DEORE RD-M5120 and RD-M4120 series derailleurs. It fits directly on RD-M5120-SGS and RD-M4120-SGS models, offering an OEM-compliant replacement for seamless integration.

Design and materials

The pulleys are moulded from high-quality plastic, combining light weight with wear resistance. This material choice helps reduce overall group weight while ensuring durability suited to All Mountain MTB demands.

Performance and riding

With 13 teeth, the pulleys optimise chain tension and reduce drivetrain noise. The result: smoother shifting, better pedalling efficiency and a quieter riding experience.

Recommended use

Ideal for All Mountain mountain bikers looking to maintain or restore shifting accuracy. Suitable for 10 and 11-speed DEORE transmissions mentioned.

Installation and maintenance

The sets install as a direct replacement for the original pulleys on supported models. Regular maintenance (cleaning and chain lubrication) will extend pulley life and preserve shift quality.