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Old 07-06-2010, 10:18 AM   #1
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31"s on a 15x8'' wheels?

I have 31 inch tires and i am getting new wheels. soft 8's 15x8.
So the question is what should the backspacing be?

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Old 07-06-2010, 10:21 AM   #2
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31 x what? 9.50, 10.50 11. 50 etc.. makes a difference also if 10.50... then 7" rims is fine.

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Old 07-06-2010, 10:27 AM   #3
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I run 31" on factory 15" rims.
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Old 07-06-2010, 10:27 AM   #4
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I'd go for 4.5" of BS if available for those soft 8's if that 31" is the usual 31x10.50 tire size. Certainly no less than 3.75" of BS but 4.5" of BS is better for that width tire.
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Old 07-06-2010, 12:43 PM   #5
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PLEASE consider an inexpensive set of aluminum wheels! Steel wheels suck.

For 31-10.50-15s, I would go with a 15x8 wheel with 3.75" BS. That will allow you lot of room to play if you go with 33s or 35s in the future. And don't tell me, "I will never go above a 31" tire." Famous last words. I remember thinking the same of 32s. Then 33s, then 35s, then 37s. Now I am on 39s. 42s next? Maybe. 40s at least for sure.
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Old 07-06-2010, 02:23 PM   #6
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Quote:
Originally Posted by lancetkenyon View Post
PLEASE consider an inexpensive set of aluminum wheels! Steel wheels suck.

For 31-10.50-15s, I would go with a 15x8 wheel with 3.75" BS. That will allow you lot of room to play if you go with 33s or 35s in the future. And don't tell me, "I will never go above a 31" tire." Famous last words. I remember thinking the same of 32s. Then 33s, then 35s, then 37s. Now I am on 39s. 42s next? Maybe. 40s at least for sure.
what are some nice aluminum wheels? And why are steel bad?

And thanks for the help guys.
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Old 07-06-2010, 02:27 PM   #7
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Steel wheels dent and bend too easily. And whenever they get scratched up while offroading, then you've got a rust problem requiring a wire brush and touch up paint. I tried steel wheels for a few years, never again.

There are a lot of inexpensive but still decent quality aluminum wheels around. Personally, I used to run the American Racing #23 aluminum wheel which looks pretty tough and holds up well. You can see them on my website in the top photo on page one, and on the 2007 Sledgehammer trail page.
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Old 07-06-2010, 02:31 PM   #8
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I used to wonder what the difference between steel and alu rims were until I started at Tread Quarters as a tire and rim " specialist"
Jerry is right steel will dent and bend both, granted alu breaks easier than steel if its as thick as steel, but alu rims are so thick that they are more stable and actually stronger than steel. better looking too.
I have steel rims.....................(for now)
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Old 07-06-2010, 03:00 PM   #9
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I have run both.. no major difference.. though I have had more tires come off the rims with alumin rims vs. steel rims. Next set will be steel.
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Old 07-06-2010, 03:02 PM   #10
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Here's a cool pic of a friend's steel wheel after one day on the rocks in Johnson Valley. No one in my favorite group of wheelers runs steel wheels any more.
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Old 07-06-2010, 03:17 PM   #11
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What about the weight difference? Aluminum wheels are lighter correct? Wont this make a difference, especially if it is a Daily Driver?
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Old 07-06-2010, 03:22 PM   #12
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C.mon Jerry, are you saying an aluminum wheel would hold up better with that kind of abuse Geez
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Old 07-06-2010, 03:28 PM   #13
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Quote:
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Here's a cool pic of a friend's steel wheel after one day on the rocks in Johnson Valley. No one in my favorite group of wheelers runs steel wheels any more.
Clearly that guy needs to learn the meaning of stop..
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Old 07-06-2010, 03:43 PM   #14
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C.mon Jerry, are you saying an aluminum wheel would hold up better with that kind of abuse Geez
Absolutely, they do. That's why you rarely see steel wheels on the most well-built hardcore rock crawling rigs.

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Clearly that guy needs to learn the meaning of stop..
That's not the issue, he's an excellent and long-term experienced driver in the extreme trails this wheel got dented in. The wheel wasn't dented from running into rocks while racing around. Steel wheels can dent like that when you slide off one big rock onto another rock below, for one example of a way it happens, while barely crawling over the rocks. If we drove any slower in such conditions, we'd be stopped.
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Old 07-06-2010, 04:04 PM   #15
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One more question... What's the bolt pattern for a 97'tj?
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Old 07-06-2010, 04:10 PM   #16
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One more question... What's the bolt pattern for a 97'tj?
All Wranglers up through 2006 have a 5x4.5" wheel bolt pattern.
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Old 07-06-2010, 04:20 PM   #17
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What about the weight difference? Aluminum wheels are lighter correct? Wont this make a difference, especially if it is a Daily Driver?
That depends on the rim, alu mod rims are heavier than stock steel rime on some vehicles, and on pickups alu is lighter than steel, the wagon wheel in the picture thats totaled is lighter than most alu rims, but personally I don't see that much of a difference in weight when I pick em up. Basically the common person like most of us on here are, wouldn't notice a difference.
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Old 07-06-2010, 06:19 PM   #19
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I like the 950's....


also
Quote:
Originally Posted by Jerry Bransford View Post
Absolutely, they do. That's why you rarely see steel wheels on the most well-built hardcore rock crawling rigs.

That's not the issue, he's an excellent and long-term experienced driver in the extreme trails this wheel got dented in. The wheel wasn't dented from running into rocks while racing around. Steel wheels can dent like that when you slide off one big rock onto another rock below, for one example of a way it happens, while barely crawling over the rocks. If we drove any slower in such conditions, we'd be stopped.

now Jerry how hard could the trail be.. he was running MTR's.. those are mall jeep tires...
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Old 07-06-2010, 09:27 PM   #20
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Also, steel wheels do not balance as easily, often requiring a lot of weights to do so. Then, when a weight falls off(and it will), your wheel is out of balance again. I actually run 0 weights on any of my wheels. 17x8.5 Walker Evans beadlocks with 39" BFG Reds. They run great up to about 70 MPH.
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Old 07-07-2010, 10:03 AM   #21
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Black Rock

I vote for the Black Rock (I have the 916's) 4.75 backspace. I tried the 4.00 BS but I didn't like how it placed the tire beyond the flares. There is no rubbing on the inside or out and it keeps the wheels from sticking out past the stock flares. I think 31x10.5r15's look good and function well with a modest lift. I did a BB .75 rear and 1.75 in front to level it off.
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Old 07-07-2010, 10:17 AM   #22
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I bought the Cragar 397's with 4" BS and have 31's mounted on them. I really like them.
You can get them cheaper than what Qtec is selling them for too. Check Summitracing.com.
If you're not going to be rock crawling, which with 31's, you can only do so much, steel wheels will work fine for you.
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Old 07-07-2010, 03:39 PM   #23
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Old 07-07-2010, 03:41 PM   #24
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...the all Black looks tight as Hell...
What? Is the size wrong or what?
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Old 07-07-2010, 07:19 PM   #25
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What? Is the size wrong or what?
Oops sorry I should have used modern language instead of the 70's language
What I meant was its a dope foot that needs a off the chain shoe

Translation to real language : I like that rim best
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Old 07-07-2010, 07:27 PM   #26
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Oops sorry I should have used modern language instead of the 70's language
What I meant was its a dope foot that needs a off the chain shoe

Translation to real language : I like that rim best
Nah for me 60's language works best. Far out man, for sure, oh wow, cosmic.
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Old 07-08-2010, 03:03 PM   #27
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Nah for me 60's language works best. Far out man, for sure, oh wow, cosmic.
I wasn't gonna go that far back bro, but since ya did, They're psychedelic man

( can't go more that that was born in 63 grew up in the 70's when disco was in and heavy rock ruled the air waves on AM
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Old 07-08-2010, 03:18 PM   #28
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How about this.....

"I like them". Or if AZ keeps going the way it is......"Me gusta mucho".
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Old 07-09-2010, 02:54 PM   #29
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O the language I learned as a child and grew up with

Howdy yall, thems some great lookin rims thar

( American Southern Hill folk language )
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Old 07-09-2010, 02:59 PM   #30
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"whatche got thar boy? them wheels is fancy.."

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