Alivio RD-T4000-SGS Rear Derailleur (9-Speed) Vendor_KMC and great for quick trips

and great for quick trips to the market

R9100 and Ultegra 6870/6770 equipped bicycles

50mm Chainline

Compatibility extends to industry-standard 10-speed systems

Alivio RD-T4000-SGS Rear Derailleur (9-Speed) Vendor_KMC and great for quick tripsShimano's Alivio Rear Derailleur is built to withstand the rigors of off road riding, with a lightweight aluminum body and low friction pivots for incredibly easy and smooth shifting. And, the Alivio features 11 tooth pulleys, which alternate chain link contact reducing wear and smoothing pedaling. SPECS: Largest Cog: 34 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 45 Cage Length: Long Rear Der Shifter Compatibility: Shimano