I made up a calculator that allows you to compare the effect of changing tyre sizes, gearbox ratios and/or diff ratios on speed. Also allows a simple comparison between tyre sizes.
It's an Excel spreadsheet, if anyone is interested drop me a pm and I'll send a copy over.
Smart!
Here is one I posted to gomog years ago. My favorite, tho I also posted others.
https://www.tacomaworld.com/tirecalc?tires=215-55r17-215-50r17 It compares any two tyres and gives you a visual, form the front and side.
gmg
