[Shredosaur]

I recently stumbled upon this tool for comparing wheel and tire sizes. It's pretty cool to see a visualization of the change in geometry from one wheel and tire size to the next. As an amateur in this subject, the representation has definitely given me a better understanding of offset, scrub radius, and backspacing, as I was mostly unfamiliar with these terms previously.

https://www.wheel-size.com/calc/

 

[Utah Motorsports]

That is much better than the MIATA tire calculator. Used the latter for years