Rapid Rise Only. 9-Speed Shimano. It will work with Shimano 8 and 7 speed drivetrains. Rapid Rise means the derailleur works in the opposite direction from a conventional one.
An important part of a rear derailleur's job is keeping the chain taut as you change gears. Chain-wrap capacity is a number that tells whether or not a derailleur will be able to do this on the drivetrain you plan to use it on. Calculate chain-wrap capacity with this formula: Chain-wrap capacity = (large chainring - small chainring) + (large rear cog - small rear cog). Example: 44/29 chainrings and a 11-28 cassette: (44 - 29 = 15) + (28 - 11 = 17) = 32-tooth chain-wrap capacity.
Largest cog: 32 tooth
195/207 grams (short/medium cage)
For use with Shimano 11-speed road drivetrains