I've used several online tire size calculators,but none of them went into imperial units for larger tire sizes like 33x12.5x15.

I came across this one lastnight and thought it was absolutely fantastic and one of the best I have used.

Check it out, it'l probably come in handy for many of you.

http://www.1010tires.com/TireSizeCal...?action=submit

 

where's the 34/10.5 size.

punks

 

hey,i just said ONE OF the best. haha

 

I've always liked this one:

http://www.miata.net/garage/tirecalc.html

 

or just lift it and get tires that don't have the metric mumbo jumbo on the side.

 

That's the one I always used to use,but that doesn't have the imperial tire sizes.

Kind of hard if you want to compare a 245/75/16 to a 33x11.5x15 unless you know the metric measurements.

 

Or use your brain... that's what the problem is with young ppl these days...

235 / 75 r 15

((235*((75/100)*2)/25.4)+15

Section width * Aspect Ratio as Percentage * 2 (because there's 2 sidewalls in a tire diameter) / 25.4 (to convert to inches) + wheel diameter

It's all very simple and Works every time! Put it in Excel and save it!

 

Gah thanks! Was looking for that formula the other day!