Upgrade your mountain bike gear with the SHIMANO RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur. This derailleur boasts a low profile design thanks to the Shadow Plus technology, reducing chainstay interference and providing a chain tensioning device that minimizes noise and prevents dropped chains.

Designed for use with 11-23/11-28 cassettes, this rear derailleur is compatible with Dyna-Sys 10-speed Shimano products. Its aluminum construction is durable and lightweight, while the sealed bearing pulleys ensure smooth operation. The 4 fluoric coated link pivot bushings further enhance the derailleur’s performance, offering precise shifting and reliable chain retention.

The SHIMANO RD-M640 Zee Shadow Plus features a Dyna-Sys specific cable pull for HG-X 10-speed mountain drivetrains, ensuring optimal shifting performance. The improved cable routing and shadow design help eliminate dropout contact, providing a seamless riding experience.

With a direct mount frame compatibility, this derailleur is versatile and easy to install. The aluminum construction and sealed bearing 11-tooth guide pulley offer durability and efficient chain management. The Shadow Plus cage tensioner reduces chain bounce and quiets down the drivetrain, allowing you to focus on your ride without distractions.