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Old 01-31-2013, 05:46 PM   #1
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Quick Rim Question

So I have never been a rim and Tire kind of guy. Actually have never upgraded a tire in my life, run whatever is on it when I buy it. Though I now own a Jeep, with this addiction, it is impossible.

So I am trying to figure out with the 15x7 3.75" Backspacing rims I have, will my rear be able to have 33's without rubbing the spring plate?

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Old 01-31-2013, 05:49 PM   #2
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Yes, 3.75" of backspacing gives enough clearance for a 12.5" wide tire in the rear. However, a 15x7 wheel is about 1" too narrow to be the optimal size wheel for a 12.50" wide tire. A 15x8 is what is usually recommended for offroading with a 12.5" wide tire. A 15x7 wheel is good up to about the 32x11.50 tire size. Can you run a 33x12.50 on a 15x7? Yes, some do but it's not recommended and I wouldn't do it myself.

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Old 01-31-2013, 05:52 PM   #3
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Originally Posted by Jerry Bransford View Post
Yes, 3.75" of backspacing gives enough clearance for a 12.5" wide tire in the rear. However, a 15x7 wheel is about 1" too narrow to be the optimal size wheel for a 12.50" wide tire. A 15x8 is what is usually recommended for offroading with a 12.5" wide tire.
Excellent news, probably the best I have received all day Jerry, I realize the 15x8 is what is recommended, but I want to atleast put these on right now and save up for my Cragars. I just bought them last night not thinking because they were a hell of a deal. Would you say for 2 months it might be ok to run them on the 15x7 with not offroading, and the TINY bit I do, isn't rough at all, usually could drive my wife's Honda through it!

Lastly, on the 2.5" Spring Lift, 33's will fit correct?
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Old 01-31-2013, 06:00 PM   #4
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3" is the bare minimum I'd go with for a street Jeep running 33" tires, with 4" recommended for offroading. With a 2.5" lift, I'd add a 1" body lift to run 33" tires which is very inexpensive and easily installed.

A couple months on 15x7 wheels with your 33x12.50 tires should be fine.
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Old 02-01-2013, 07:10 PM   #5
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IS 4.9" backspace to much for a 16x8 wheel with 32's. That's the only backspace they offer for the wheel I want.
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Old 02-01-2013, 07:15 PM   #6
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4.9" is a little too much, the most backspacing I'd run with 32x11.50 tires is 4.5". A 16" size really (!) restricts your choices of wheel styles & tires, can you find what you're looking for in a 15" or 17" size? Those two sizes of tires & wheels generally cost less than 16" too. Or should I say that 16" wheels & tires are generally more expensive because there isn't a large variety available in that size.
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Old 02-01-2013, 07:26 PM   #7
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awsome Jerry, that's what I need to know. That was just the wheel I liked the most, but there are still plenty out there I like also. It's nice to know people like you are willing to offer advice to newb's like myself. Thanks!
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Old 02-01-2013, 09:43 PM   #8
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Sorry jerry I call bs. I've spent the last couple of months shopping for wheels and tires and comparing prices for 15, 16, and 17 trying to figure out how to get the most out of my small budget. My jeep came with 16's so I first thought about upgrading to 17's, nope 17" wheels equals more expensive wheels and more expensive tires. So what about 15's, ok so 15" wheels are a little cheaper and 15" tires are a little cheaper but not anywhere near cheap enough to cover the cost of the new wheels. so I'm stuck with my 16's for now but thats fine since I can find a HUGE variety of different tires in a 315/75/16 (35/12.50/16). Seems to be plenty of 37's available too, if I ever decide to move up a size.

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