I'm waiting on my lift to arrive, and Ive been contemplating which tires I want to run, Ive decided on running 31x10.50r15s,
My question is on the backspacing, it seems the common is 4"-4.5" of backspacing, which is better? will either work? And does one rub more than the other?

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2006 Black KJ Sport
31x1050r15 Nokian Vatiiva M/Ts
15x7 Cragar soft 8s
Skid Row engine skid
Skid Row gas tank skid
Hella 500s

many people will say 4" but im running 3.75" of BS on a set of cragar D-windows, 15x8, and it works perfectly with no rubbing. But id say stay around the 3.75"-4" BS mark.

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05 KJ Limited (fully loaded)
2.5in Daystar front spacer/OME HD rear coils
Rancho RSX shocks
31x10.5x15 BFG AT on black steels
Front and rear tow hooks
Polk audio db6501 full range speakers and tweeters
12" Kicker Comp CVR sub

Depends on the width of the wheel.

15X7 = 4" backspacing is best

15x8 = 5" backspacing is best

I run 16x8 with 4.5" backspacing, and they still work great. I like having the wider stance, but at the expense of a little rubbing up front.

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2004 Black Renegade, manual transmission, Frankenlifted, JBA 4.5 A-arms, 31" Super Swamper M16's on Pro Comp 8128 wheels, MagnaFlow exhaust, Volant cold air intake, and clear front signals.

Are you sure you have 8" wide wheels?

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2004 Black Renegade, manual transmission, Frankenlifted, JBA 4.5 A-arms, 31" Super Swamper M16's on Pro Comp 8128 wheels, MagnaFlow exhaust, Volant cold air intake, and clear front signals.

thanks for the replies, i'm gonna run a 15x7, i'm gonna go ahead and go for the 4" bs, since your at 4.5" and its working well, i'll be plenty good at 4".

ryanee182, i see in your sig youre running ss m-16s, how do you like them? thats one of the tires ive been considering, the reviews online seem to be all over the place with what people think of them.

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2006 Black KJ Sport
31x1050r15 Nokian Vatiiva M/Ts
15x7 Cragar soft 8s
Skid Row engine skid
Skid Row gas tank skid
Hella 500s

http://www.offroadunlimited.com/orustor ... oduct=9531

These are the exact wheels

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05 KJ Limited (fully loaded)
2.5in Daystar front spacer/OME HD rear coils
Rancho RSX shocks
31x10.5x15 BFG AT on black steels
Front and rear tow hooks
Polk audio db6501 full range speakers and tweeters
12" Kicker Comp CVR sub

I've been wondering about this too. I might possibly fall into some 31x10.50 tires soon but I'd have to buy 15" wheels.

I noticed that Quadratec sells 15x8 Black Rocks with 4.5 or 4.75" of backspacing for $59.99. I might go that route.

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2005 Stone White KJ Limited CRD 4x4
Off-Road Pkg
Trac-Lok
Emu 790s/948s
Skyjacker H7088s rear/Bilsteins front
15x7 Black Rock Lobos/31x10.50 Firestones
GDE HOT Tune + TCM Tune
Euro TC
CB radio
Thrush Turbo muffler
AEM DryFlow filter

So far, I love them! They do surprisingly well in heavy rain for a MT, but haven't had them in snow. Off-road: I haven't had much time to fully test them, but they haven't disappointed me yet. They get a bit noisy around 40 MPH, but are quiet (for a MT) above/below 40 MPH. My only small complaint is they like to pick up small rocks in the tread. They are the best looking tire I have ever owned, and get complements on them all the time! I'd say get them, if you can find them...

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2004 Black Renegade, manual transmission, Frankenlifted, JBA 4.5 A-arms, 31" Super Swamper M16's on Pro Comp 8128 wheels, MagnaFlow exhaust, Volant cold air intake, and clear front signals.

Heres some really recent pics with the wheels and tires on my KJ. Scroll to the bottom of the page

http://www.jeepforum.com/forum/f160/cen ... st10192749

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05 KJ Limited (fully loaded)
2.5in Daystar front spacer/OME HD rear coils
Rancho RSX shocks
31x10.5x15 BFG AT on black steels
Front and rear tow hooks
Polk audio db6501 full range speakers and tweeters
12" Kicker Comp CVR sub