Judging by the number of questions posted about comparative tire & wheel sizes, it seems to be a confusing subject.
I thought this freeware windows
Tire Size Calculator (link) might be a useful download. It's the best among the many I've seen.
Open the zip file & run the "
setup.exe" file to install.
No affiliation, blah, blah, blah.
Edit: The original link posted here was to a new version of the Tire Size program I've used successfully for years. I just found the new version has glitches, so I've changed the link to download the old program from my Rennlist website. Sometimes new isn't better.
Linear Mode
