Shimano's Ultegra RD-6800 derailleur pulleys - idler pulley and jockey pulley, each with 11 teeth - are compatible with the mechanical Ultegra 11-speed rear derailleur RD-6800 and the electronic rear derailleur Di2 RD-6870. The sealed precision bearing in each pulley contributes to a low-friction drivetrain.
. Set of 2 pulleys
. Teeth: 11 teeth
. Bearings: double, sealed
. Chain: 11-speed
. Gearing (max.): 11
. Compatibility: SHIMANO Ultegra RD-6800, Di2 RD-6870