PRECISION SEALED BEARINGS IN BOTH GUIDE & TENSION PULLEYS KEEP DRIVETRAIN SMOOTH & FRICTION-FREE
COMPATIBLE MODEL:
RD-R8000-GS, RD-R8000-SS, RD-R8050-GS, RD-R8050-SS, RD-RX800-GS, RD-RX805-GS, RD-RX812, RD-M8000-GS, RD-M8000-SGS, RD-M8050-GS, RD-RX817 & RD-R8150
COMPATIBLE SERIES:
ULTEGRA R8000 Series, ULTEGRA R8050 Series, ULTEGRA RX800 Series, GRX 11-speed, DEORE XT M8000 Series, DEORE XT M8050 Series, GRX DI2 & ULTEGRA R8100 Series
