Shimano Ultegra RD-R8000 Rear Derailleur - GS - Medium

The SS (Short Cage) version is compatible with cassettes up to 11-30T. The GS (Medium Cage) version is compatible with cassettes up to 11-34T.

No, the Shimano Ultegra RD-R8000 is designed for 11-speed drivetrains only.

Lubricate the derailleur regularly, depending on riding conditions. In dry conditions, every few rides. In wet or muddy conditions, after each ride.

You will need a hex key set, a screwdriver, and possibly a chain whip and cassette lockring tool for cassette removal/installation.

Use a derailleur hanger alignment tool, which is available at most bike shops. Or, have a professional check it.

The B-tension screw adjusts the distance between the upper pulley wheel and the cassette cogs. This impacts shifting performance.

The user manual can be found on the Shimano website or in the product packaging.

Use an 11-speed chain.

Check and adjust the cable tension, limit screws, and B-tension screw. Make sure the derailleur hanger is straight. Consider replacing the chain if worn.

Check for chain interference, ensure the chain is lubricated, and inspect the pulley wheels for wear. Check for any rubbing against the frame.

Check the cable routing and cable tension. Make sure the limit screws are properly adjusted. Check the cassette and chain for damage.