285/70/17. 285 is width 70 is the %of the width the side wall is and 17 is obviously the rim diameter. The higher the number in the 70 Position the taller the side wall.

I didn't write this. Any change in any of the three numbers changes the tire diameter/height.

285/70/R17
_^__^__^
_A__B___C
A- This is the width of the tire in millimeters. The conversion is 1"= 25.4mm so for our example: 285/25.4= 11.22" width.
B- This part is the "aspect ratio" of the tire and is a relation of the tire's width to the sidewall height of the tire. In our example it's '70'. This means the sidewall height is 70% (.70 in calculation) of the width of the tire. That means the sidewall height is:

11.22 x .70= 7.85"
BUT there is a 'sidewall' both above and below your wheel when measuring height, so you must multiply this by 2 when calculating the tire's overall height.
C- This third piece is simply your rim size. So, for a final calculation of a tire's size, you add this to the total from part B.

In conclusion, a 285/70/R17 equates to 11.22" wide and is (7.85x2)+17"= 32.71" tall, or basically equivalent to a 33x11.50R17 if we called it a standard size.

285/70/17. 285 is width 70 is the %of the width the side wall is and 17 is obviously the rim diameter. The higher the number in the 70 Position the taller the side wall.

Before going 31/10.5/15. I had a set of Goodyear Sr or something they were 235/75/15 they were almost 3/4" taller than my Dayton timberline at that had the same tread depth but were dryrotted.

would anyone mind pulling up the sears website real quick and seeing what different sizes there are for fierce attitudes in the 33" range? It would be greatly appreciated

would anyone mind pulling up the sears website real quick and seeing what different sizes there are for fierce attitudes in the 33" range? It would be greatly appreciated

by my calculations the 305 70 16 would be 33.81" tall and a little bit wider is that correct?

32.7 is closer to 33's - 32 3/4". Your previous question was,

"would anyone mind pulling up the sears website real quick and seeing what different sizes there are for fierce attitudes in the 33" range? It would be greatly appreciated"

I didn't see any 305's listed there. Can't you go to the Sears site yourself?

32.7 is closer to 33's - 32 3/4". Your previous question was,

"would anyone mind pulling up the sears website real quick and seeing what different sizes there are for fierce attitudes in the 33" range? It would be greatly appreciated"

I didn't see any 305's listed there. Can't you go to the Sears site yourself?

I did and they do have a 305 70 16 there, so would that tire be 33.81" tall?

I did and they do have a 305 70 16 there, so would that tire be 33.81" tall?

That would be 32.81" tall since you reduced the wheel size by an inch. Basically a 33. If wheel size is optional why not go 15"? More choices and cheaper.

All of the above is why I hate metric size tires, I can never figure out what their sizes are in inches without a frigging calculator & I can't think in millimeters. Metric tire sizes are just too complex for my old brain any more.

__________________ ...Gone wheeling, back Sunday night.

All of the above is why I hate metric size tires, I can never figure out what their sizes are in inches without a frigging calculator & I can't think in millimeters. Metric tire sizes are just too complex for my old brain any more.

Bet my brain is older than your brain...! Just remember divide by 25.4...

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC