Fun with Wheels and Tires!!!! - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 12-17-2007, 01:20 PM Thread Starter
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Fun with Wheels and Tires!!!!

Ok here is the story.

I have a 2000 f350 CC 2wd in need of some new rubber, and I was hoping to get you guys imput. I have several choices.

1. get new 235/85 R16 (31.5")rubber and keep running my factory alcoa's (Cheapest by far, but im tired of only get 30k miles out of them and I was hoping to step up a size to bring my RPM's down because I have 4.10's

2. Get 19.5's from Rickson Truck and run 245/70 R19.5s (32.3"). (maybe, but I hear that 19.5 tires suck and I'm still only gaining a very small amount of RPMs)

3. Get some adapters and run 22.5" alcoas and 255/70 R22.5s (36") from the local big rig salvage place. (Very cool but how much lift am I going to have to have to clear them. American Force's website claims 6" for a 2wd but then they show a pic of a truck with them on it at stock height. Plus they say a 4wd can run them at stock height. is there really a 6" difference in the 2wd vs 4wd suspension??

What do you guys think.

Thanks

Joey

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post #2 of 21 Old 12-17-2007, 01:43 PM
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I dont believe that the 2wd and 4wd is 6" different by any stretch. Hopefully someone who knows for sure will chime in.

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post #3 of 21 Old 12-18-2007, 04:44 AM Thread Starter
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Bump for a little help

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post #4 of 21 Old 12-18-2007, 04:49 AM
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Its between 2 and 4" difference. You won't fit anything over 35's without 6". Even with that you might have to shave a little of the inside wheel well. If you got a 2" leveling kit, you might fit 33"s.

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post #5 of 21 Old 12-18-2007, 03:06 PM
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I have run 33 X 12.50 X 16 on my 2WD on stock wheels with zero rubbing.

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post #6 of 21 Old 12-18-2007, 03:19 PM
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I moved up to the 265/75r16 from the 235/85's. Better load ability and look a lot nicer.

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post #7 of 21 Old 12-18-2007, 03:25 PM
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Here is how the 265/75r16 look on a 2wd.



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post #8 of 21 Old 12-19-2007, 06:12 AM Thread Starter
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yeah, but I have a dually, will they rub each other in the back???

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post #9 of 21 Old 12-19-2007, 07:18 AM
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no they will not rub I recomend 285/75s they are almost 33" tall but are narrower than a 305/70 which is a 33x1250.also a 235/85 is tall and narrow and about the same height as the 285

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post #10 of 21 Old 12-19-2007, 07:32 AM
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Quote:
Originally Posted by rednekexprez View Post
no they will not rub I recomend 285/75s they are almost 33" tall but are narrower than a 305/70 which is a 33x1250.also a 235/85 is tall and narrow and about the same height as the 285

Stock Tire - 235/85R16
Section Width: 9.25 in 235 mm
Rim Diameter: 16 in 406.4 mm
Rim Width Range: 6 - 7 in
Overall Diameter: 31.72 in 805.68 mm
Sidewall Height: 7.86 in 199.64 mm
Radius: 15.86 in 402.84 mm
Circumference: 99.65 in 2531.1 mm
Revs per Mile: 655.7
Actual Speed: 60 mph 100 km/h
Speedometer Difference: -
Diameter Difference: -

Tire 1 - 265/75R16
Section Width: 10.43 in 265 mm
Rim Diameter: 16 in 406.4 mm
Rim Width Range: 7 - 8 in
Overall Diameter: 31.64 in 803.65 mm
Sidewall Height: 7.82 in 198.62 mm
Radius: 15.82 in 401.82 mm
Circumference: 99.39 in 2524.5 mm
Revs per Mile: 657.3
Speedometer1: 60.1 mph 100. km/h
Speedometer Difference: 0.244% too fast
Diameter Difference: 0.26%

Tire 2 - 285/75R16
Section Width: 11.22 in 285 mm
Rim Diameter: 16 in 406.4 mm
Rim Width Range: 7.5 - 9 in
Overall Diameter: 32.83 in 833.88 mm
Sidewall Height: 8.41 in 213.61 mm
Radius: 16.41 in 416.81 mm
Circumference: 103.1 in 2618.7 mm
Revs per Mile: 633.5
Speedometer1: 57.9 mph 96.6 km/h
Speedometer Difference: 3.504% too slow
Diameter Difference: 3.39%

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