10 speed rear derailleur with 9 speed shifter and cassette

Hey. So my current set up is a 1x9 speed ultegra set up with sram attack 9 speed shifter up front

My Ultegra 6500 rear derailleur has died. so i need to get a new derailleur. Can i use a 10 speed derailleur (duraace/ultegra) if i cant get a 9 speed one?



But I’ll get some pics of that ultegra 9spd one now.

To elaborate, any SIS shimano (or compatible, eg SRAM 2:1, microshit etc) mech will work, with few exceptions, any shimano road 6-10sp, mtb 6-9sp.

Excellent! the answer i was looking for. Thanks heaps.