Wheel Fitment Simulator

Looks like a cheaper version of the old Percy Wheelrite tool

Wheel Fitment Tool, Tire Fit Testing Size Measuring Mockup, 5-Lug

Looks like the Percy tool might not be available anymore either. I recall it being expensive enough that I never really considered buying one, so it must have been more expensive than this one!

They’re definitely helpful, but they certainly don’t guarantee a perfect fit either. Still have to make sure your calipers and things will clear your wheel choice etc. And you still need a tire that’s pretty close to your intended final size, although you might be able to return an unmounted tire at some places.

Certainly decent insurance if you’re going to shell out a boatload of cash on custom wheels.