Shimano Tourney Tx Rd-Tx800 7/8 Speed Mtb Rear Derailleur

This Shimano Tourney 7/8 Speed Rear Derailleur has a double servo-pantograph technology that improves adjustability and resists weather and contamination.  The guide pulley tracks the cogs closely while moving front to back, optimizing each shift. It has a shorter derailleur Smart Cage that grants you MegaRange capability with the shorter cage.  

Features: 

- Model No: RD-TX800
- Series: TOURNEY TX
- Rear speeds: 8/7
- Compatible chain: HG 8/7/6-speed
- Max. front difference: 20T
- Low sprocket: Max.34T Min.28T
- Top sprocket: Max.14T Min.11T