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Discussion Starter #1
I am looking at some Pro Comp wheels and they measure 20x9.5 with a 5 in. backspace and a -6mm Offset. Will these wheels stick out much? I would like to put 35x12.50x20 tires on it and would like the wheels and tires to stick out of the wheel wells as LITTLE as possible. Would this setup be close to what I am looking for? Is there a better backspace and offset to go with in order to keep the tires and wheels tucked in as much as possible?

Thanks!
 

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Do you have any kind lift on your truck?

Even if you do, I think you'll have some serious rubbing issues w/that setup...
 

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Discussion Starter #3
No lift yet, but plan on a 6inch. Why will this setup rub, what is the reccomended offset and backspace?
 

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I don't think the tires are the problem, the problem is the wheel you've picked. I think the width & the offset will give you problems. Stock 18's are 8" wide 25MM o/s & 5.5 b/s. Most people think that you have less rubbing issues when you push the wheels & tires out further, but that's not true it's actually the exact opposite. When you push them further from the hub, you increase the arc that the swings, so you have MORE problems w/rubbing.

I have comparisons for the tires & the wheels below.

I really think you'll run into some problems running those tires on THAT wheel.


Here's how the tires compare

Stock Tire - 265/70R18
Search Tires Tire 1 - 35x12.50R20

Section Width: 10.43 in 265 mm
Section Width: 12.51 in 318 mm

Rim Diameter: 18 in 457.2 mm
Rim Diameter: 20 in 508 mm

Rim Width Range: 7 - 9 in
Rim Width Range: Unrecognized tire size.

Overall Diameter: 32.60 in 828.04 mm
Overall Diameter: 35.02 in 889.50 mm

Sidewall Height: 7.30 in 185.42 mm
Sidewall Height: 7.51 in 190.75 mm

Radius: 16.30 in 414.02 mm
Radius: 17.51 in 444.75 mm

Circumference: 102.4 in 2600.9 mm
Circumference: 110.0 in 2794 mm

Revs per Mile: 638.0
Revs per Mile: 593.9

Actual Speed: 60 mph 100 km/h
Speedometer1: 55.8 mph 93.0 km/h

Speedometer Difference: - Speedometer Difference: 7.425% too slow
Diameter Difference: - Diameter Difference: 6.92%


And Wheel Comparison - From American racings wheel calculator
OFFSET CALCULATOR
This calculator will help with the selection of wider wheels. Fill in the four fields below and hit the 'Calculate' button. You may also use the arrows to adjust the wheel offsets. Keep in mind when selecting a wheel offset is to make sure your strut housing-to-wheel clearance is not significantly reduced, or the insides of your tires will rub suspension pieces, or not fit at all. This calculator should be used as a guide and does not necessarily mean a particular wheel size will work with your vehicle. As always, Motegi Racing suggested that you test fit wheels and tires before mounting them.
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Current Wheel Width 8 inches Current Wheel Offset 25 mm
New Wheel Width 9.5 inches New Wheel Offset -6 mm

Your new wheel will have the following characteristics:

The clearance from strut housing to the inside of the wheel will be 12mm MORE
The outside edge of the wheel will EXTEND an extra 50mm

50mm is about 2 inches.
 
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