Outer Limits 4x4 Board

Just wondering because I can't tell,

Is there some kind of chart that might say a
75/R16/22 or whatever equals a 15" x 33" x 12.5".

I simply dont understand the metric tyre sizing system.

Cheers

Let's take an example.

265/75/16

265 = width in mm
75 aspect ratio = ( sidewall is 75% of the width)
16 - rim diameter in inches

So 265 divided by 100 times 75 divided by 2= 397.5mm - that's the height of the sidewalls. / 25.4 for inches = 15.64

+ 16" for the rim = 31.64" - about right.

265 is about 10.5" wide.

So a 265 75 16 is about 31.5X10.5.

I have seen some converters ( I think novak conversions in the US had/has one) but I just calculate it out. It's no more work than opening explorer and plugging the numbers in. The numbering convention is always the same -

235 85 16 - 399.5 of sidewall/25.4, + 16" = 31.72

235 is about 9.25"

Steve.

I just use this:

http://www.onlineconversion.com/tire_si ... ersion.htm

That one's pretty good.

I use this one:

http://www.1010tires.com/TireSizeCalcul ... ion=submit

It gives you more information and allows you to compare different tyres.

Neale

Thanks guys, good answers

Corgie Carrier wrote:I use this one:

http://www.1010tires.com/TireSizeCalcul ... ion=submit

It gives you more information and allows you to compare different tyres.

Neale

yep. that one looks better.

Steve.