Actually i Did not prove your point at all you were talking about time not all that other stuff. I said it takes 2 more seconds BUT some tires are harder to mount than other like potenzas doesn’t matter what size rim its on its just harder to mount.As for the different machine sure but you were talking about time and i said it doesn’t take more time and for your polished crome lip or whatever that your specific rim and care is relative to the person who is mounting the tire. Nothing with tire size. The fact is that it doesn’t take more time to mount bigger tires. I’ve done tires many times. The time factor is the hardness of the tire and the profile of the tire… or if its streched or not… many things like that. Not the rim size. a 15 inch rim going to a 16 inch rim isnt costing the shop a 5 or 10 dollar increase in time. unless for some reason they have a machine for every single size of tire and the machines get progressively slower and slower the bigger rim they mount.