I have a full 105 5800 group for my current drivetrain on my bike. I would like to replace the right crankset (chainring + crankarm) with an Ultegra R8000 right chainring/crankarm. Is there full compatibility? Or do I need to replace/adjust chain, front derailleur, left arm, BB, anything in the rear?
Of course I'd keep the same number of teeth and crank length.
I've checked Shimano's compatibility chart and it looks fine to me, but it's very complex, I'm no expert and this is a big purchase that I don't want to regret.