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Old 07-23-2013, 05:51 PM   #1
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15 inch wheels on jku

How come the tire stores are telling me I can't run 15s on my 2007 Jku?

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Old 07-23-2013, 05:59 PM   #2
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My bet would be its because of the size of your brakes. The 15" wheels won't give you enough clearance inside to clear the rotors and calipers.

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Old 07-23-2013, 06:00 PM   #3
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Long story short, some 15" wheels are not big enough to allow for proper brake caliper fit. Discount Tire has quite a few alloy wheels in the 15" size that fit your jeep--I'm running 15" MB-72 wheels on mine. Two things to be aware of, first, steel wheels (15") probably will not fit your Jeep due to their manufacturing process. Second, even 15" alloy wheels will be a close fit. You cannot double stack the adhesive wheel weights as they will rub the calipers--first hand knowledge of this.
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Old 07-23-2013, 06:07 PM   #4
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Aluminum should fit steel will probably require you grind the front calipers. I run cragar soft 8s, 15x8. Ground the front calipers. Its pretty easy.

Dunno about other places but summit racing allows returns on wheels until you mount tires on em.

I had discount tire mount mine with regular lead weights on both sides. This is definitely a function over form place for me.
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Old 07-23-2013, 06:14 PM   #5
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Quote:
Originally Posted by DrLecter90210 View Post
How come the tire stores are telling me I can't run 15s on my 2007 Jku?
probably because they plug your make and model into a computer and the computer defaults to factory specs
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Old 07-23-2013, 06:16 PM   #6
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Bingo
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Old 07-23-2013, 06:17 PM   #7
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the tire store goes by what is said in their magical computer configurations. Some stores are well versed in our jk's, some aren't.

edit: the guys above beat me to the punch lol.
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Old 07-23-2013, 06:49 PM   #8
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I have 15x8 Level 8 Trackers on my JKU. I got them from Discount Tire.
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Old 07-24-2013, 12:05 PM   #9
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I have 15 inch alloys from DT. They fit, but I kind of wish I went with 16s. The clearance between the calipers and wheels is too close for my comfort. Playing in the mud, I must have gotten some rocks or something caught in between my calipers and wheels and it tore some weights off and scraped up the inside of the wheel pretty bad.
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Old 07-24-2013, 12:23 PM   #10
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Here is some info that I got from Discount Tire that might help:

15" steel wheels do not clear the JK calipers. We have an excellent selection of 15" alloy wheels that work though. See the thread linked below for details.

15" MB72 alloy Vs 15" Steel wheels
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Old 07-24-2013, 12:30 PM   #11
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Quote:
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I have 15 inch alloys from DT. They fit, but I kind of wish I went with 16s. The clearance between the calipers and wheels is too close for my comfort. Playing in the mud, I must have gotten some rocks or something caught in between my calipers and wheels and it tore some weights off and scraped up the inside of the wheel pretty bad.
The two edges of the caliper have about 1 bazillionth of an inch of clearance with 15s depenxing on how much cajones you had to grind the calipers. You have about the same clearance between the brake pads and rotors. Rocks would suck there too. With 16s you would have about an inch of clearance. Youre still gonna get a rock in there eventually.
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Old 07-24-2013, 12:35 PM   #12
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I'm running 15's on my 07 JKUR.
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Old 07-24-2013, 12:38 PM   #13
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15x8 level 8 trackers here.
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Old 07-24-2013, 12:50 PM   #14
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I'm looking at Discount tires...do you know the exact size?

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15x8 level 8 trackers here.
I'm trying to get them to provide me a quote on the whole package. I want the wheels and nitto tires and I need to make sure I'm getting the right thing quoted.

I appreciate the help.

See below for where I am on discount tire webpage...

Find Level 8 Tracker custom wheels by size
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Old 07-24-2013, 02:27 PM   #15
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15x8 5-127 bolt pattern. Thats metric for 5x5.

Honestly isnt there a discount tire near you?
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Old 07-24-2013, 02:57 PM   #16
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Not here in my office there's not. So I'm asking you people.
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Old 07-24-2013, 05:11 PM   #17
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Quote:
Originally Posted by DrLecter90210 View Post
How come the tire stores are telling me I can't run 15s on my 2007 Jku?
Because they don't know what they are talking about. I have run 2 sets of Pro Comp 52 steel wheels on 2 different JKs. 15x10 on my 08 and 15x8 on my 11. Both fit fine with no rubbing on the caliper or anywhere.

Part of the problem is that if they can't find it in their computer they find it easier to just say its not available instead of actually do some legwork and find out what fits. Kinda like the guy that tried to tell me I had a Dana 35 front axle. Too many people that think they know something but really don't.
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Old 07-24-2013, 05:28 PM   #18
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Quote:
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The two edges of the caliper have about 1 bazillionth of an inch of clearance with 15s depenxing on how much cajones you had to grind the calipers. You have about the same clearance between the brake pads and rotors. Rocks would suck there too. With 16s you would have about an inch of clearance. Youre still gonna get a rock in there eventually.
I'm have not removed any material from my calipers and I have something like a quarter of an inch of clearance. Too close for my comfort but oh well.
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Old 07-24-2013, 06:37 PM   #19
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Quote:
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I'm have not removed any material from my calipers and I have something like a quarter of an inch of clearance. Too close for my comfort but oh well.
Oh i had to grind mine in 3 places and its so tight a rock coukdnt even fit haha
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Old 07-24-2013, 06:46 PM   #20
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I have 15x8 MB 72's on mine. Very little clearance but no issues so far.

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Old 07-24-2013, 06:52 PM   #21
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What is the reason for wanting to run 15 inch wheels vice 16? Is it just for looks? More tire selection? Cheaper tires?
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Old 07-24-2013, 06:55 PM   #22
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tires are cheaper, that's the reason I like to run them
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Old 07-24-2013, 07:15 PM   #23
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Oh i had to grind mine in 3 places and its so tight a rock coukdnt even fit haha
Huh that's strange. I've considered grinding mine for a little extra room. Where in Michigan are you?
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Old 07-24-2013, 08:23 PM   #24
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What is the reason for wanting to run 15 inch wheels vice 16? Is it just for looks? More tire selection? Cheaper tires?
Tires are cheaper and I personally like more sidewall for wheeling.
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Old 07-24-2013, 08:41 PM   #25
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Huh that's strange. I've considered grinding mine for a little extra room. Where in Michigan are you?
Im in buchanan, mi (us31 at indiana border) and theyre cragar soft 8s, steel rims. Also they rubbed on the face of the caliper where that bar that runs across is, because of the way they punched the holes out of the wheels. Ground about 2/16" off there. Honestly youre going to get rocks caught in any wheel. Thats why my wheels are cheap.
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Old 07-25-2013, 07:42 AM   #26
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Tires for a 15" wheel are way less expensive.

Look around on Craigslist for a while to see what you can find. I had no plans to go to a 15" wheel at all until I found the set I have on Craigslist for a smokin' good deal.
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Old 07-25-2013, 08:28 AM   #27
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I saved around $500 because i went with 15s and thats the only way i could afford the tires. that and advance america.
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Old 07-25-2013, 08:35 AM   #28
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Quote:
Originally Posted by DrLecter90210 View Post
I'm trying to get them to provide me a quote on the whole package. I want the wheels and nitto tires and I need to make sure I'm getting the right thing quoted.

I appreciate the help.
Remember that discount tire direct gives a $50 discount of any order of 5x wheels and another $50 discount off 5x tires. They also offer a $50 discount to wrangler forum members.
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Old 07-25-2013, 12:33 PM   #29
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Here is some info that I got from Discount Tire that might help:

15" steel wheels do not clear the JK calipers. We have an excellent selection of 15" alloy wheels that work though. See the thread linked below for details.

15" MB72 alloy Vs 15" Steel wheels

They couldn't be more wrong if they tried. 15 inch steel, 3.75 backspacing from Summit Racing (44 bucks each free shipping). Plenty of clearance on the brakes. They just say that because they don't have a steel wheel with 3.75 backspacing.


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