Shimano Tiagra RD-R4000 11 Speed Rear Derailleur

- Offering pro-level features, the 11-speed compatible Tiagra rear derailleur gives high performance at a low price
- Wide link design increases rigidity and service life
- Advanced light action for low-friction shifting up or down the block
- Alloy body's and outer link leads to lower weight without compromising strength and durability
- Two fluorine-coated link pin bushings for low-friction performance
- 36 tooth max cassette with double chainset
- Compatible with 11-speed chains, CSRS40011136 and ST-R4020/ ST-U6030 STI's only