This Shimano RD-6700 pulley wheel set is designed for cyclists who need a reliable replacement for their 10-speed rear derailleurs. The set includes two pulleys, both with 11 teeth, engineered for Shimano road and mountain groupsets. The guide pulley uses a ceramic bushing for smooth, long-lasting operation, while the tension pulley benefits from a sealed cartridge bearing for reduced friction and ease of maintenance. Compatibility covers Ultegra RD-6770, 6700-A, 6700, 6600, 6500; Saint RD-M810-A, M810, M806, M805, M801, M800; XT M772, M771, M770, M761, M760, M751, M750; Nexave C910; and XT Trekking T780. These pulleys are specifically for 10-speed systems and are not suitable for 11-speed or other incompatible setups. Installation is straightforward for most Shimano derailleurs, and the set is recognized for its durability and resistance to side-loading, making it a practical choice for riders who want reliable performance without the compromises of generic aftermarket options. This pulley set is ideal for those maintaining or upgrading older Ultegra, XT, or Saint derailleurs and seeking original manufacturer quality.