Shimano Rear Derailleur Ultegra RD-6770 Di2 10-speed
This is a used Shimano RD-6770 Di2 10-speed rear derailleur. The upper and lower pulleys have been replaced with third-party units (manufacturer unknown). Made in Japan.
Shimano Rear Derailleur Ultegra RD-6770 Di2 10-speed #1
This is a used Shimano RD-6770 Di2 10-speed rear derailleur.