R-series rear derailleurs are designed to work with 7 8 9 and 10-speed Shimano-compatible road shifters. These R8 rear derailleurs have composite and steel parts that weigh more but have the same durability and performance as R9 and R10.

Steel pulley cage for extra durability

Not compatible with Shimano Tiagra 4700 road system

Largest Cog	28
Color	Black
Rear Der/Shifter Compatibility	Shimano Road
Rear Derailleur Mount Type	10x1 Standard
Drivetrain Speeds	9
Weight	230
Chain Wrap Capacity (teeth)	39
Cage Length	Long