![Anyone familiar with this Dura Ace RD-7700 rear derailleur? Looking to use it with a ten speed cassette but was wondering if anyone has tried it (bc of age, manual only mentions Anyone familiar with this Dura Ace RD-7700 rear derailleur? Looking to use it with a ten speed cassette but was wondering if anyone has tried it (bc of age, manual only mentions](https://i.redd.it/ytlqnoc6ur281.jpg)
Anyone familiar with this Dura Ace RD-7700 rear derailleur? Looking to use it with a ten speed cassette but was wondering if anyone has tried it (bc of age, manual only mentions
![Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur (Black) (11 Speed) (Short Cage) (SS) - Performance Bicycle Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur (Black) (11 Speed) (Short Cage) (SS) - Performance Bicycle](https://images.performancebike.com/cdn-cgi/image/f=auto,width=950/images/large/bikes/shimano/irdr9150ss_1.jpg)
Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur (Black) (11 Speed) (Short Cage) (SS) - Performance Bicycle
![Shimano Dura-Ace RD-R9150 11-Speed Di2 Rear Derailleur Excel Sports | Shop Online From Boulder Colorado Shimano Dura-Ace RD-R9150 11-Speed Di2 Rear Derailleur Excel Sports | Shop Online From Boulder Colorado](https://images.excelsports.com/public/large/118064-1.jpg)