...dakota-truck.net/TIRECALC/tirecalc.html -tire size calculator.. http://www.dsm.org.....TIRE TECH PAGE.. Since nobody else will explain tire sizing to you, here it ...
little P. I used to know , or partially knew, what is the deal with the whole 255 r40 numbers etc, ? Is it a measurement in Millimeters or something. and is that just a ratio of tread width ...