SHIMANO ULTEGRA GRAVEL BICYCLE 10 SPEED GS MEDIUM CAGE REAR DERAILLEUR RD-6600
Model RD-6600.
Shimano Ultegra RD-6600 GS 10 Speed Rear Derailleur Road Touring 3x Wide Range
Shimano Ultegra RD-6600 GS Rear Derailleur in used shape. 3x or 2x (wide range).