I made this Excel wheel / tire size calculator when I was trying to figure out what would fit the G37 Sedan. It just has two options in it, but you can easily add more by just copying the last tab. It also makes stick figure drawings of whatever you are considering vs. stock. I checked it over twice, but if anyone finds a bug, let me know. It's nice to see visually what happens when you change offset, add a spacer, etc. The numbers in bold are what you have to input. Everything else is calculated for you.

 

Moved this over to the wheel folder, thanks for posting this. My Excel subscription has expired (DOH!) but should be a useful tool.

 

seeing that graph makes me want to use y=mx+b to find slopes

 

Brad, just upload it to google drive and use Sheets.

 

Thank you for this helpful tool!