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Discussion Starter · #1 ·
hey anybody running 325 60R 18 tires on stock 18 inch rims? im looking into powder coating my stocks and puting that size on but id like to know if it is possable to do or find out what sizes i can fit on the stocks. pics would help as well guys.
 

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He's already on a 4" lift. Shouldn't be a problem.
 

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Discussion Starter · #6 ·
Carbeaux said:
He's already on a 4" lift. Shouldn't be a problem.
ya i got a crapy lift from rancho and my 285-70-17s are rubing. so im working on geting something better. i got so screwed by 4wheel.
 

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285.70.17's tires shouldn't rub at stock height with the correct offset wheel. Sounds like your wheels are wrong, your lift might be ok.

If like you want to run your stock wheels with the 325.60.18 tires. You might have rubbing on the front when you turn fully right or left. A better tire size would be 305.65.18 or 275.70.18. you still might rub a little but these tires would look great with a 4" lift. and they would fit better on your stock wheels. (test fit)

If I was you I would buy a lower offset wheel in either 17" or 18". with your 4" lift, a lower offset wheel will bring the wheel and tire out away from the truck making it possible for you to put larger tires on without rubbing. You would need to find a wheel with an offset in the 0 to -6mm range for a 8.5-9" wide wheel. If you find an 18-8.5 or 18x9" wheel with a -6mm offset you should be able to run your 325.60.18" tires with no problems. finding a wheel with those specs shouldn't be too hard either. The HotWheel D-dack comes in that size, The MB Razor, and the MB Predator do too.

Hope this helps and isn't too confusing.
 

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Discussion Starter · #9 ·
TravisDTD said:
285.70.17's tires shouldn't rub at stock height with the correct offset wheel. Sounds like your wheels are wrong, your lift might be ok.

If like you want to run your stock wheels with the 325.60.18 tires. You might have rubbing on the front when you turn fully right or left. A better tire size would be 305.65.18 or 275.70.18. you still might rub a little but these tires would look great with a 4" lift. and they would fit better on your stock wheels. (test fit)

If I was you I would buy a lower offset wheel in either 17" or 18". with your 4" lift, a lower offset wheel will bring the wheel and tire out away from the truck making it possible for you to put larger tires on without rubbing. You would need to find a wheel with an offset in the 0 to -6mm range for a 8.5-9" wide wheel. If you find an 18-8.5 or 18x9" wheel with a -6mm offset you should be able to run your 325.60.18" tires with no problems. finding a wheel with those specs shouldn't be too hard either. The HotWheel D-dack comes in that size, The MB Razor, and the MB Predator do too.

Hope this helps and isn't too confusing.
i found out today that my offset on my after market procomp rims are 4 3/4 and the rancho kit wants a 6. i also found out its called a 4 inch kit but its really a 6 inch kit. im so mad. if i wanted a 6 inch kit i would have payed for a better kit.
 

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Discussion Starter · #11 ·
TravisDTD said:
with your procomps and 285.70.17 tires, where are you rubbing?
driver side front inner rear fender
 

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A 6" Backspacing would only bring the wheels in further. If that's what you mean by the lift wanting a 6. I can't tell without looking at it how much further you would need to move the wheels out due to your lift kit but a 17x9 with a 0mm offset would give you a 4.5" backspacing and would push out your wheel and tire .25" further than they are now, find a 17x9 with a -6 offset you push them out .5" (if your procomps are 17x9) you might want to do a search on pinch weld modifications. That might solve your problem as well.
 

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TravisDTD said:
A 6" Backspacing would only bring the wheels in further. If that's what you mean by the lift wanting a 6. I can't tell without looking at it how much further you would need to move the wheels out due to your lift kit but a 17x9 with a 0mm offset would give you a 4.5" backspacing and would push out your wheel and tire .25" further than they are now, find a 17x9 with a -6 offset you push them out .5" (if your procomps are 17x9) you might want to do a search on pinch weld modifications. That might solve your problem as well.
You are right about most of this but a "nominal" 9 inch rim is actually, (usually about), 10" wide so with 0mm offset, the backspacing is 5".
For backspacing the formula is nominal width +1" (to account for the lips) divided by two, (this gives the centerline, plus positive or negative offset for the wheels' backspacing.
Here's a great chart, (that I first saw here), that TitanTalk's Sammy Sandbag posted up. It confirms a 9" rim with a 0mm offset has a 5" b.s., (I've also confirmed the formula above by measuring my spare O.R. rim).


.
 

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NorCal 4x4 said:
You are right about most of this but a "nominal" 9 inch rim is actually, (usually about), 10" wide so with 0mm offset, the backspacing is 5".
For backspacing the formula is nominal width +1" (to account for the lips) divided by two, (this gives the centerline, plus positive or negative offset for the wheels' backspacing.
Here's a great chart, (that I first saw here), that TitanTalk's Sammy Sandbag posted up. It confirms a 9" rim with a 0mm offset has a 5" b.s., (I've also confirmed the formula above by measuring my spare O.R. rim).


.
Correctamondo, Thanks for the correction.
 
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