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Old 05-19-2013, 01:06 PM
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wheel and offset question

hey, have a question about wheels and offset, searched forever but cant really get a clear answer on what i want or need. I currently have roughly 8' of lift (6'' 4 link kit from rough country and 2 leveling kit) im wanting to go with a 38x13.50x20 tire/wheel combo but not sure on what to get with back spacing and offset. Also not sure if i should go with a 9'' wheel or a 10. any advice would be greatly appreaciated. truck is a 07 btw. thanks.
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Old 05-19-2013, 03:41 PM
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38s work with 8" of lift.

With a 13.50 tire, I wouldn't mount it on anything LESS than a 20x12. A -12 off set will maintain the OEM backspace, a -51 will give you about a 4.5" backspace, as in push the tires out farther. I have 38x13.50s on 10s on our half ton, I have to run 25 psi to get anymore than the center tread on the road.
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Old 05-20-2013, 01:16 PM
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so a -25 off set would i rub do you think
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Old 05-20-2013, 01:29 PM
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You should definitely stay with 4.5" of backspacing regardless of the wheel width for a lifted superduty. If you stay in that backspacing, the extra width on your wheel will all be on the outside.
-12 in a 9"
-24 in a 10"
and most manufacturers will make a -44 in the 12"'s, that is actually 4.75" of backspacing, but will work just fine if you can't find a wheel in -51mm.

As far as the width goes, a lot of it is personal prefference on how you like the wheel/tire to look. Manufacturers have reccomended widths and lots of people have opinions on it too, but do what you like the look of.

I had Toyo 12.50's (actually 13.5 wide) on 9" and got 70,000 miles on them @60psi. To me 9" looks a little too narrow for a 12.50-13.50, but mine lasted great. I think 10" wide wheel is the perfect size for that tire. That is what i'm running now, I like that look much better. Every time one of my customers comes in and gets 13.50's on a 12" wheel, I just don't like the look of it.....too wide for the tire IMHO.
Most of that is my opinion, but I hope some of that helps
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Old 05-20-2013, 01:34 PM
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Quote:
Originally Posted by aaron89 View Post
so a -25 off set would i rub do you think
Shouldn't on on a coil spring truck....
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Old 05-20-2013, 04:06 PM
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for what its worth, i ran 12.6" wide tires on a 9" wide rim on my 05 and run the same tire on my 2010 with a 10" wide rim now and road manners are definitely better and wearing much better. so go as wide as you can especially with a 13.5" wide tire i would atleast get a 10" wide rim. good luck
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Old 05-22-2013, 07:32 AM
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Quote:
Originally Posted by aaron89 View Post
so a -25 off set would i rub do you think
It depends on the width, -25 offset will have different backspacing as width changes. If you are considering a 10" wheel with a -25 offset and a 13.50 wide tire, then you're probably going to end up trimming the spoiler under the front bumper.

Sent from my LG-VS700 using AutoGuide.Com Free App
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Old 05-22-2013, 02:15 PM
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wouldnt mind a bit of trimming, think im going with XD monsters in a 20x10 and runnung 38x13.5 toyos, anyone have any pros or cons with either of these. thanks.
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Old 05-22-2013, 02:44 PM
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Like I said earlier, I wouldn't mount a 13.50 tire on a 10 inch wheel. If you use a 12" wheel, then you can run a higher psi without riding on the center of the tread. A higher psi means less rolling resistance which means not as much of an mpg loss rolling 38s.

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Old 05-23-2013, 06:18 PM
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i just ordered my 7" lift for my 2011 and ive been told numerous times by many members, that i will be fine running 20xp BMF Novacianes on a Toyo M/T 38/13.50/20.????? am i missing something here??
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