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Old December 18th, 2011, 05:38 PM   #1
MonkeyBiz
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Tire Sizes?

What size tires are people running on their trucks? Stock, my 1/2 ton GMC Sierra has 265/75/16. I currently have the +size tire of 285/75/16.
I want some thing that has similar height, but not the with of the 285/75/16. Did a little looking, and 255/85/16 seem close to the 33'' height that I like. What is are the rest of you running, and what do you think of them?


Width Aspect Wheel Diameter Section Width
305 65 16 31.6 12.0
345 65 16 33.7 13.6
245 70 16 29.5 9.6
305 70 16 32.8 12.0
225 75 16 29.3 8.9
245 75 16 30.5 9.6
265 75 16 31.6 10.4
285 75 16 32.8 11.2Currently Have
295 75 16 33.3 11.6
215 85 16 30.4 8.5
235 85 16 31.7 9.3
255 85 16 33.1 10.0 Desire
265 85 16 33.7 10.4 Desire
305 85 16 36.4 12.0
255 70 16 30.1 10.0
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Old December 18th, 2011, 05:43 PM   #2
wave_crusher
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Depends on what your going to be doing, just driving your better off going with 285s, they look better than the 265's and really have no impact on your spedo, and gas milage.

I know you said you don't really want 285s but others like 255/85s are gonna mess with your spedo a lot (+/- 5 mph)
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Old December 18th, 2011, 06:34 PM   #3
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can you link me to the site that you found that chart?

Looking for similar info for 17"
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Old December 19th, 2011, 11:40 AM   #4
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This is the website I used. It doesn't have a 17 inch chart.
Quote:
A website with the info your are looking for
17-inch rims 235/65R17 9.25 inches 29.5 inches
265/70R17 10.4 inches 31.6 inches
255/75R17 10.4 inches 32.0 inches
285/70R17 11.2 inches 32.7 inches
315/70R17 12.4 inches 34.3 inches
Besides the one, I had a hard time finding a chart with 17 inch rim. Here is a calculator that you can input your own numbers, get get the information you are looking for.
calculator
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Old December 19th, 2011, 12:00 PM   #5
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Originally Posted by wave_crusher View Post
Depends on what your going to be doing, just driving your better off going with 285s, they look better than the 265's and really have no impact on your spedo, and gas milage.

I know you said you don't really want 285s but others like 255/85s are gonna mess with your spedo a lot (+/- 5 mph)
285/75R16s and 255/85R16s are both about 33" tall and bigger than his stock size.

A 285/75 is about 1.3" taller than a 265/75


On my 1/2 ton F150, I run 265/70R17s, which are a touch bigger than the stock 255/70R17s. They are also load range E, so a good bit heavier than the lightweight p-rated stockers. I lost a good 1 mpg making the change to the taller/ more aggressive tire.
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Old December 19th, 2011, 12:04 PM   #6
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Originally Posted by MonkeyBiz View Post
This is the website I used. It doesn't have a 17 inch chart.


Besides the one, I had a hard time finding a chart with 17 inch rim. Here is a calculator that you can input your own numbers, get get the information you are looking for.
calculator
Or, just use a calculator.

265/70R17 (my tire)

Width in inches: 265 (section width) / 25.4 = 10.43 wide

Height = (width * aspect ratio / 1270) + rim size

= (265 * 70 / 1270) + 17 inches = 31.61 inches tall
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Old December 19th, 2011, 07:05 PM   #7
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Thanks to both of you for the reply. I'm planning to run H2's on the GW.
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