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Old 06-04-2013, 08:45 AM   #1
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2003 TJ Wheel bolt size and back spacing

Looking at getting 15x8 5 on 4.5" with 3 5/16" backs pacing. How do I know if that back spacing will require spacers or anything?

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Old 06-04-2013, 08:45 AM   #2
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Old 06-04-2013, 08:51 AM   #3
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Definitely not going to need spacers. The lower the backspacing number, the smaller the amount of wheel that is protruding on the hub side from the mounting surface.
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Old 06-04-2013, 08:57 AM   #4
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Thanks! This is all foreign language to me. Just want it to look clean. Plan on putting 31x10.5R15 on them.
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Old 06-04-2013, 08:58 AM   #5
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What size tires? 3.25" isn't much backspacing, that little amount will very likely leave your tires & wheels positioned further out than is needed.

Edit: With 31x10.50 tires, I'd go with a wheel that has more backspacing. 4-4.5" would be much better for that size tire. Backspacing is a measurement that moves a wheel in or out of a wheelwell... the more backspacing, the more into the wheelwell the wheel & tire is positioned.

The yellow tape measure below is measuring the wheel's backspacing.
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Old 06-04-2013, 09:02 AM   #6
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Ratings, reviews and specifications for General Grabber Red Lettering tires

Here are the tires. Would you recommend a different wheel size?
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Old 06-04-2013, 09:03 AM   #7
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I would recommend a wheel with more backspacing, that is for sure.
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Old 06-04-2013, 09:11 AM   #8
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Those wheels only come in that backspacing that I've found. The classic 3's come in at 3 5/8". I don't know if M/T makes the 2's anymore and they aren't on their site.

I know that the backspacing on a 10.5" wheel may look odd to some, and in my opinion it is less than ideal. However, when I move to 33x10.5's I intend to use those wheels because they are the lightest I've found in that size by a few pounds. For me, it's an "acceptable" compromise, not an optimal choice. Good luck with whatever you decide.
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Old 06-04-2013, 09:13 AM   #9
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another vote for 4-4.5bs for a 10.50 wide tire...I only ran 3.75 with the 12.50 wide 33's on my old tj.

Also don't forget your get free shipping form q-tec.. you can let them know your a forum memeber or PM the user name quadratec here on the forum.
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Old 06-04-2013, 06:56 PM   #10
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I certainly would not run a 10.5" wide wheel with a 31x10.50 size tire, that is way too wide of a wheel for that tire. I'd run nothing wider than 8" with a 15x7 being optimal for that size tire. My backspacing recommendation remains the same no matter what width wheel.
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Old 06-04-2013, 07:06 PM   #11
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Somewhere in this post it went from the OP's 8" wheel to a 10.5" wheel....I think he said the tire was 10.5" wide.
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Old 06-04-2013, 08:25 PM   #12
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Rephrase my question

Let me start over. What size wheel / tire would you recommend? I want 31" tall and 15" wheel. I'm not sure what the "normal" size tire/wheel for those sizes are.

At what point will I need spacers to compensate for the back spacing?

I'm looking at doing a suspension upgrade / 2 or 2.5" lift. What brand had the BEST highway ride?
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Old 06-05-2013, 09:37 AM   #13
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Quote:
Originally Posted by UsualJag View Post
Let me start over. What size wheel / tire would you recommend? I want 31" tall and 15" wheel. I'm not sure what the "normal" size tire/wheel for those sizes are.

At what point will I need spacers to compensate for the back spacing?

I'm looking at doing a suspension upgrade / 2 or 2.5" lift. What brand had the BEST highway ride?
1) 7" to 8" wide wheel

2) You won't need spacers unless you go above 4.5" backspacing (try to stay between about 3.75" and 4.5"

3) I would take a look a Old Man Emu, but there are other good ones. See what others are happy with.
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Old 06-05-2013, 06:23 PM   #14
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Thanks Dennis. So the 3 5/16 back spacing I'm looking at on the M/T Classic II isn't enough? That's the only option they have withough going from an 8 to a 10.
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Old 06-05-2013, 07:17 PM   #15
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Quote:
Originally Posted by UsualJag View Post
Thanks Dennis. So the 3 5/16 back spacing I'm looking at on the M/T Classic II isn't enough? That's the only option they have withough going from an 8 to a 10.
No one is saying it wouldn't work, but the less backspacing means the tire sticks out from the body further and is slightly more stressful on the hub. Personally, I would look at other wheels (but that's just me). Definitely DO NOT go with a 10" wheel.
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Old 06-05-2013, 10:03 PM   #16
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I got ya. I'll do some searching. Do you have any recommendations on black alloy wheels? Can't really afford more than $120 per wheel with everything else I'm wanting.
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Old 06-05-2013, 11:47 PM   #17
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I'm the one who said 10.5" wheel, but I know (and I figured everyone else would know) that I meant tire.

The M/T wheels in question come in the backspacing the OP mentioned on the 15x8 wheel. I personally will gladly accept 3/4" less than "ideal" backspacing in order to shave 3# off each wheel, especially when going with a 10.5" tire (notice I used the correct verbiage there). I can't believe anyone would stress over 3/4" outboard on an 8" wide wheel and a 10.5" tire. I understand the engineering perspective on paper, but the percentage of "stress increase" would be insignificant when placed up against a numerically higher backspacing and a 12.5" wide tire, which is commonly run without so much as a peep from anyone.
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Old 06-06-2013, 08:28 AM   #18
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Maybe these, they look similar to the wheels you linked
http://www.quadratec.com/products/92819_290X_B_PG.htm
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Old 06-06-2013, 01:46 PM   #19
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I just got 31x10.50R15 on cragar d window 15x8 with 4" BS This is what it looks like
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Old 06-06-2013, 10:09 PM   #20
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Quote:
Originally Posted by wwch99tj View Post
Thanks for the link. That should work. But... With 4.5" back spacing will I need to add wheel spacers? I thought I read somewhere that anything over 4 or 4.25" back spacing will require wheel spacers?
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Old 06-06-2013, 10:12 PM   #21
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Originally Posted by 98TJ Wrangler- View Post
I just got 31x10.50R15 on cragar d window 15x8 with 4" BS This is what it looks like
Nice ride . Do you have a lift or anything? Wheel spacers? Thanks for the pic, that helps a bunch.
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Old 06-07-2013, 02:14 PM   #22
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Quote:
Originally Posted by UsualJag View Post

Nice ride . Do you have a lift or anything? Wheel spacers? Thanks for the pic, that helps a bunch.
Thanks! No lift or wheel spacers and the best part no rubbing! I love it.

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