TNI Speed Pulley 11 15T Aluminum Cage Steel Bearing 2601158

Big pulley cage using aluminum cage. It is expected to reduce frictional resistance and increase drive efficiency by reducing rotational speed and chain bending angle. Number of pulley teeth: 11T (Upper)/15T (Lower) Pulley bearing: Steel Material: Aluminum (pulley/cage) Reference weight: 69g Compatible rear derailleur: Shimano 11 speed (RD-9000, RD-9070, RD-6800, RD-6870) TNI rear derailleur pulley A big pulley cage that uses an aluminum cage. Standard type with steel bearing specifications.