u/Dull_Potential_5533

Hi!

I have an older road bike with an Ultegra 10-speed drivetrain. Unfortunately the rear derailleur is done, and need replacing. I am absolutely lost on which rear derailleur replacement would be compatible with a 10-speed ultegra shifter.

It seems its only from Tiagra and below that 10-speed are still made. Would it be possible to just put a 10 speed Tiagra rear derailleur on?