Shimano Ultegra RX Rear Derailleur-RD-RX800-GS

-Chain Stabilizer mechanism adopted from MTB design

-ON/OFF switch

-Compatible with current road DUAL CONTROL LEVER

-Max. front difference: 16T

-Total capacity: 39T

-Low sprocket: Max. 34T/Min. 28T

-Top sprocket: Max. 12T/Min. 11T

-Average weight:248 g