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Old January 20th, 2009, 08:58 AM   #1
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Default Help shed some light -wheel width-

If i want to run 33-12.5-15 what width do i need. I was thnking 15x10 but i call to order tire packages from different shops and they reccomend a 15x8.
Now my jeep is going to be on concrete 95% of its life i dont know it that matters. But if we do go off road and i drop the tire psi to 15 or so does the width of the wheel matter? How about offset? My wife likes to have the wheels to stick out 3" past the factory tj flares. Any idea what i should look for?

thanks.
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Old January 20th, 2009, 09:22 AM   #2
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Most people running a 12.5" tire are running a 15x8 wheel(assuming they're not running beadlocks.) A. It looks better, and B. It'll hold the tire on the wheel better than a 15x10 wheel when aired down.
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Old January 20th, 2009, 09:35 AM   #3
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You don't need to run a 10" rim (bead to bead) until you *maybe* get to a 13.5" wide tire (you can still get away with a 13.5" wide tire on an 8" rim). Generally speaking, rim width looks correct, the sidewall functions correctly, and tread wears correctly at about 2.5"-3" under your tread width.

Tire/wheel shops frequently fukc this up. They also tend to fukc up your backspacing by suggesting what they think works and confuse you by talking about offset (instead of backspacing) because they are used to totally confusing the import/bling crowd instead of wheelers.

Before you pick your backspacing, spend some time in the Rig Builds & Pictures Forum. If you don't see the exact combo, just ask and people can post pictures to show you what the finished product will look like.
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Old January 20th, 2009, 09:37 AM   #4
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8 to 9 inch.
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Old January 20th, 2009, 09:40 AM   #5
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Thanks for the help. Any recommendations on offset?
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Old January 20th, 2009, 09:50 AM   #6
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Quote:
Originally Posted by Disco Stocker View Post
Thanks for the help. Any recommendations on offset?
Yes. Don't speak that word. Speak in "backspacing".


I see your avatar, but too many people have avatar pictures of vehicles that they do not own, so can't make an assumption there. Can't recommend backspacing until you tell us what the vehicle is, what kind of lift is on it, what the axles are, what rim width you're going to buy, and what tire size you are going to buy. Its all about clearance, Clarence.
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Old January 20th, 2009, 10:09 AM   #7
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97 tj with 3" rusties lift 1" body spacer
looking to run 15x8 steel wheel with 33-12.5-15 tire.

Thanks

Last edited by Disco Stocker; January 20th, 2009 at 10:14 AM.
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Old January 20th, 2009, 10:12 AM   #8
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Quote:
Originally Posted by Disco Stocker View Post
97 tj with 3" rusties lift 1" body spacer
looking to run 5x10 steel wheel with 33-12.5-15 tire.

Thanks
no. you're looking to run a 15x8 steel wheel
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Old January 20th, 2009, 10:14 AM   #9
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no. you're looking to run a 15x8 steel wheel
your right sorry got 3 things going at once.
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Old February 23rd, 2010, 05:08 PM   #10
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Quote:
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Yes. Don't speak that word. Speak in "backspacing".
A 15x8 wheel with 0.5"-0.75" negative offset would work.

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Old February 23rd, 2010, 06:18 PM   #11
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your gonna want less than 4 inches of backspacing. 3.75" or 3.5" would be good.
i ran 4" on a similar tj and they slightly rubbed my lower control arms at full turn.
go 15x8 not 15x10. you could even get away with 15x7, but its not necessary unless you air way low quite often.
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Old February 23rd, 2010, 06:22 PM   #12
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15x8 will work but 15x10 look alot better and wear nicer i have ran both ways i like the 15x10
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Old February 23rd, 2010, 06:25 PM   #13
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I've run 33x12.50 tires on 8 inch, 7 inch, and 6.5 inch rims. All on my old S-15 jimmy years ago.

8 inch I had air leaks if I aired down below 20psi
7 inch was really nice, and I'd go that way again. I could air down to 7 psi with no issues. Perfect tread wear for 20,000 miles.
The stock chevy 6.5 rims worked O.K. but I started to get uneven tread wear in the middle of the tread.
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Old February 24th, 2010, 05:59 AM   #14
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usually the manufacturer has a recommended wheel width for a specific tire model and size.
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Old February 24th, 2010, 08:59 AM   #15
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Quote:
Originally Posted by cjric View Post
usually the manufacturer has a recommended wheel width for a specific tire model and size.
And usually it is too wide for off road use. Manufacturer recommendations are based on on-road use only, and for ideal tread wear. My old 33x12.50 goodyears recommended a 10 wide rim. They would have blown a bead if I looked at them wrong if I would have gone that wide.
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Old February 24th, 2010, 09:21 AM   #16
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Quote:
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usually the manufacturer has a recommended wheel width for a specific tire model and size.
Which is usually retarded, too.
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