Re: Highway speeds/engine rpm/ gearing and other stuff

Posted by PackardV8 On 2013/4/1 11:04:21

Going back a year or 2 i think someone posted a website or mayb chart showing various tire sizes and their rolling radius relative to various other factors. I think it was Owen Dyneto that posted the chart but i'm not sure. Maybe do a search of this website to find it. A google search mite turn one up too.

However note that rolling radii can vary from mfg'er to mfg'er of tires by a 1/2 inch, maybe as much as 3/4 inch.

I've not bothered to make any calculations as to how much even just a 1/4 inch mite vary the readings. Probably not much except for very critical accuracy which i don't think we are dealing with here.