But you should reasonably expect a tyre fitter to have a rough idea
A few years ago I took our Isuzu Bighorn (Jap version of the Trooper) to our local Kwik Shit in Aldershot to have the one of the rear wheel valves replaced as it was leaking moderately badly after a kerb had been clipped by the old lady.
The so called tyre fitter removed 5 wheelnuts and then spent the best part of 10 minutes beating the crap out of the rear wheel before announcing that it was stuck to the hub and there was nothing he could do.
He looked truly amazed when I pointed out there was actually 6 wheelnuts that needed to be removed in order to get the wheel off, and still to this day I can't work out how he missed that fact......still, you get what you pay for I guess.