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Old 05-03-2013, 03:32 PM   #1
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33'' tires on 17's

are there any mud tires that are 33's on 17" rims?

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Old 05-03-2013, 03:43 PM   #2
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Yeah, they are just going to be in metric equivalent sizes. Mine are 285/70/17 BF Goodrich Mud Terrain KM2s ( basically 33 x 11.5 wide).




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Old 05-03-2013, 04:07 PM   #3
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I thought 305 was the metric equivalent of 33's....
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Old 05-03-2013, 04:11 PM   #4
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305 (285) is the width not the height.
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Old 05-03-2013, 04:12 PM   #5
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or is that for 16" rims and 285 is for 17's? The tires I would really like are fierce attitudes from sears
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Old 05-03-2013, 04:14 PM   #6
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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.
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Old 05-03-2013, 04:20 PM   #7
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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.
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Old 05-03-2013, 04:21 PM   #8
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Quote:
Originally Posted by dredg009 View Post
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.
Assuming no change in width.
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Old 05-03-2013, 04:23 PM   #9
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so the 285/70r/17d fierce attitudes are the equivalent of 33's correct?
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Old 05-03-2013, 04:25 PM   #10
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A little narrower but yes
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Old 05-03-2013, 04:25 PM   #11
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Quote:
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so the 285/70r/17d fierce attitudes are the equivalent of 33's correct?
Pretty much, 32.71 mathematically.

And not as wide as your typical 33"x12.5".
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Old 05-03-2013, 04:27 PM   #12
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Also every tire is different in measurement. Two tire with the same size can very about a 1/2"or more.
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Old 05-03-2013, 04:30 PM   #13
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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.
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Old 05-03-2013, 04:32 PM   #14
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Possibly had a different load rate and the same air pressure didn't inflate them the same but who cares I'm on to bigger and better things.
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Old 05-03-2013, 04:33 PM   #15
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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
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Old 05-03-2013, 04:47 PM   #16
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Quote:
Originally Posted by khall7 View Post
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
285/70r17 = 11.2" x 32.7"
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Old 05-03-2013, 06:39 PM   #17
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so how big would 305 70 16 be?
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Old 05-03-2013, 06:44 PM   #18
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Quote:
Originally Posted by Water Dog View Post
285/70r17 = 11.2" x 32.7"

are those not considered 32's then?
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Old 05-03-2013, 06:53 PM   #19
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by my calculations the 305 70 16 would be 33.81" tall and a little bit wider is that correct?
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Old 05-03-2013, 07:20 PM   #20
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Quote:
Originally Posted by khall7 View Post
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?
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Old 05-03-2013, 08:27 PM   #21
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Quote:
Originally Posted by Water Dog View Post
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?
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Old 05-03-2013, 09:02 PM   #22
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Quote:
Originally Posted by khall7 View Post
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.
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Old 05-04-2013, 05:34 PM   #23
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I'm currently running 15" but the tire I want doesn't come in that size so I'm changing rims too
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Old 05-04-2013, 09:23 PM   #24
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You are going to find a lot less selection in tires and higher prices if you go to 16 or 17" rims. I went to 16's and wish I hadn't.
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Old 05-05-2013, 03:58 PM   #25
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Quote:
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You are going to find a lot less selection in tires and higher prices if you go to 16 or 17" rims. I went to 16's and wish I hadn't.
If I didn't already know the tire that I want I would agree with you, but the tires that I want don't come in 15 rims
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Old 05-06-2013, 02:38 AM   #26
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nice
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Old 05-06-2013, 01:06 PM   #27
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Toyo MT makes a 295x70x17 = 33.5 excellent tire.
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Old 05-06-2013, 01:23 PM   #28
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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.
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Old 05-06-2013, 01:58 PM   #29
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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...
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Old 05-06-2013, 02:04 PM   #30
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Divide what by 25.4 to produce what? I'm 65 so we're probably both old enough to enjoy the exalted title of Forum Geezer.

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