I currently am running full Shimano Sora.
The crankset is 34/50T. The cassette is 11-34T 9 speed.
If I upgrade all my components to Ultegra, this being the rear derailleur, cassette (11 speed) and the front derailleur. Will the Sora crankset still work with the Ultegra gears? I don't really want to spend $500 on a new Ultegra crank when the one I have now is fine.
I am purchasing the 11-34T Ultegra groupset.