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Tire Size and Backspacing For Aftermarket Wheels?

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Old 06-13-2011 | 07:15 PM
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Default Tire Size and Backspacing For Aftermarket Wheels?

Ok, a couple of questions....first will a stock tire size...225/75R15 fit on an aftermarket 15x8 wheel? I am asking because original wheel size was 15x7. If not, what size tire fits on a 15x8 wheel? Second, what backspacing should I get if I don't want the wheel to stick out past the fenders? I believe the original wheel backspacing is 5.25"? Thanks.
Old 06-13-2011 | 07:33 PM
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Originally Posted by ProvRIFire
Ok, a couple of questions....first will a stock tire size...225/75R15 fit on an aftermarket 15x8 wheel? I am asking because original wheel size was 15x7. If not, what size tire fits on a 15x8 wheel? Second, what backspacing should I get if I don't want the wheel to stick out past the fenders? I believe the original wheel backspacing is 5.25"? Thanks.
Yes the 225's would work on a 15x7 wheel...i've ran tires around 2"s narrower than the wheel and tires around 4"s wider than the wheels with no problems...so your fine....and for backspacing i'd say 4.5" is a good number, not to wide but enough room for turning.
Old 06-13-2011 | 07:51 PM
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Originally Posted by Kyle 4x4 4life
Yes the 225's would work on a 15x7 wheel...i've ran tires around 2"s narrower than the wheel and tires around 4"s wider than the wheels with no problems...so your fine....and for backspacing i'd say 4.5" is a good number, not to wide but enough room for turning.

Did you mean the 225's would fit on a 15x8 wheel? By the sounds of your post I could go a bit wider with the tires on the wheels....any suggestions on a good width (nothing crazy) for a 15x8 while still keeping the wheels/tires flush with the fenders?
Old 06-13-2011 | 08:12 PM
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Not sure on whats done to your jeep...but if its stock i hear you can go up to a 235/75r15, and again if you stay from 4.5-5" backspacing they will stay inside your fenders.
Old 06-13-2011 | 08:13 PM
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This is one of the options I have come up with in my search for new wheels...I think this is my best option so far. I want to keep the width of the wheel/tires no further than flush with the fenders. Do you think the size of this wheel would do the job? Thanks.


http://www.jeep4x4center.com/product...581247#details
Old 06-13-2011 | 08:15 PM
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Originally Posted by Kyle 4x4 4life
Not sure on whats done to your jeep...but if its stock i hear you can go up to a 235/75r15, and again if you stay from 4.5-5" backspacing they will stay inside your fenders.

Thanks for the info. Yes, the jeep is currently stock. Good to know I might be able to go up to 235's. I just posted a link to some wheels that I think might fit what I am looking to do.
Old 06-13-2011 | 08:19 PM
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Yep, them wheels would work just fine.
Old 06-13-2011 | 08:35 PM
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Originally Posted by Kyle 4x4 4life
Yep, them wheels would work just fine.

Thanks once again.

Here is another option I found...4" backspacing vs 4.75" backspacing though. Also, aluminum vs steel wheels.

Thoughts on this wheel vs other I posted? Will these also stay flush with or inside fenders?

http://www.4wheelparts.com/Wheels/Se...=BRW909B580540
Old 06-13-2011 | 08:51 PM
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In my personal opinion, i like that set better...they're not just the average black steelies, something a bit different...and with the 4" backspacing they will be right on the borderline with your stock flares.
Old 06-14-2011 | 10:28 AM
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Originally Posted by Kyle 4x4 4life
In my personal opinion, i like that set better...they're not just the average black steelies, something a bit different...and with the 4" backspacing they will be right on the borderline with your stock flares.

Thanks. I like them better than the first option as well. Just not sure how they will fit. Going to look into it more.

Anyone else have opinions, suggestions, ideas?
Old 06-14-2011 | 12:25 PM
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Originally Posted by ProvRIFire
Thanks for the info. Yes, the jeep is currently stock. Good to know I might be able to go up to 235's. I just posted a link to some wheels that I think might fit what I am looking to do.
you can go wider than 235. A number of people here run 12.50s (a little wider than 315s). What matters is the tire height, stock you can fit 31s but its a stretch IMO, 30s are pretty safe though. You could fit 265/75 R15 without trouble (with the correct BS though)
Old 06-14-2011 | 04:05 PM
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Originally Posted by Hoooper
you can go wider than 235. A number of people here run 12.50s (a little wider than 315s). What matters is the tire height, stock you can fit 31s but its a stretch IMO, 30s are pretty safe though. You could fit 265/75 R15 without trouble (with the correct BS though)
You can put wider tires on if you have the correct BS...no way

Haha just messing with you...i just take it as he wants it to be more stock looking with upgraded tires, but nothing real wide and oversized...thats why i said the 235/75's...they are 29"s, so that would give him less(if any) troubles rubbing, plus would give him a bit more flex room...unless he is deciding to lift it soon, then stuff away.lol I went through that whole "stuff the biggest tire you can" stage...and i learned the hard way...its not fun, and actually kind of embaressing when your tires rub every turn or bump you hit
Old 06-17-2011 | 08:17 AM
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Originally Posted by Kyle 4x4 4life
You can put wider tires on if you have the correct BS...no way

Haha just messing with you...i just take it as he wants it to be more stock looking with upgraded tires, but nothing real wide and oversized...thats why i said the 235/75's...they are 29"s, so that would give him less(if any) troubles rubbing, plus would give him a bit more flex room...unless he is deciding to lift it soon, then stuff away.lol I went through that whole "stuff the biggest tire you can" stage...and i learned the hard way...its not fun, and actually kind of embaressing when your tires rub every turn or bump you hit
You are correct...looking to keep a more stock look at the moment. Not looking for my tires to stick out past the fenders. I will probably do a lift later when I replace shocks and springs.

I ended up ordering Black Rock 909D wheels....satin matte black...15x7, 5x4.5, 4.25 BS. Ordered some BFG Rugged Terrain T/A's...235/75R15's.

I think that should give me the exact look I want with all around good traction. Friendly for everyday and highway use with some decent traction for the light, occassional off-roading.
Old 06-17-2011 | 08:24 AM
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I've run 235x75x15s for the last 105K miles on stock 15x7" wheels. I've never rubbed even when turned fully. 30x9.50x15 may or may not rub. It would be awfully close if they don't.
Old 06-17-2011 | 10:59 AM
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For 15x8 wheel with 31x10.5 what would work best, 4" or 4.75" back spacing. I had the Bushwacker pocket flares as well
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