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 Short cage for double 28T setup microSHIFT R8 Rear Derailleur - 8,9 Speed, Short Cage, Black Color: Black Largest Cog: 28 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 33 Cage Length: Short Rear Der/Shifter Compatibility: Shimano Road Drivetrain Speeds: 8 , 9 Weight: 225 microSHIFT R8 Rear Derailleur - 8,9 Speed, Long Cage, Black Color: Black Largest Cog: 28 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 39 Cage Length: Long Rear Der/Shifter Compatibility: Shimano Road Drivetrain Speeds: 8 , 9 Weight: 230
