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post #1 of 9 (permalink) Old 05-11-2015, 02:01 PM Thread Starter
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Commander Stock Rim Size

Hello -

I have an 08 Commander, I think it's a base model 3.7. When buying new tires 245/65/R17, they noticed a crack in the rim. These are the original rims and they are all corroded so I think I'm going to buy new rims. I am trying to find the original rim size and want to be sure I have the correct info. 7.5jx17 (ET42), 5X127 The 7.5 is the width, 17 is the diameter, ET 42 is the offset and 5x127 is the bolt pattern.

Can someone tell me if I have the correct size for my Jeep Commander? Also has anyone ordered online through American Racing or Tire Rack for rims?

Thanks
Gary
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post #2 of 9 (permalink) Old 05-11-2015, 02:38 PM
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That sounds right to me. I have ordered several sets of tires through tire rack.

Why not go with less offset and get a better stance. The factory stance is a little silly imho.

These things feel a bit more planted and controlled with a better stance.

Factory wheels



Less offset, lift and 255/70r18's



Put some 255/70's on there while your at it too.

Last edited by luckyse7ens; 05-11-2015 at 02:43 PM.
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post #3 of 9 (permalink) Old 05-11-2015, 03:16 PM Thread Starter
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Thanks for your reply. Thing is, I just spent a bunch for tires. I have to buy new rims that will fit my tires. I just want to make sure I buy the correct size rims. Tire Rack has the best inventory I've seen though
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post #4 of 9 (permalink) Old 05-11-2015, 03:37 PM
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Quote:
Originally Posted by Dingo46 View Post
Thanks for your reply. Thing is, I just spent a bunch for tires. I have to buy new rims that will fit my tires. I just want to make sure I buy the correct size rims. Tire Rack has the best inventory I've seen though
You can still get a wheel with less offset for a wider track width. Spacers are a very common addition on these vehicles for a reason. I certainly prefer a proper offset instead of spacers.
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post #5 of 9 (permalink) Old 05-11-2015, 03:59 PM Thread Starter
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I'll check out spacer prices too. ET42 must be the stock offset, do you know if they are incremental? I mean, what's the next size?
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post #6 of 9 (permalink) Old 05-11-2015, 04:37 PM
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Quote:
Originally Posted by Dingo46 View Post
I'll check out spacer prices too. ET42 must be the stock offset, do you know if they are incremental? I mean, what's the next size?
Don't buy wheels and spacers, buy wheels with the proper offset and you don't need spacers.

Wheel offset/backspacing and width are all related:
Quote:
Offset


The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel. The offset can be one of three types (measured in millimeters).*

"The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel."

Zero Offset
The hub mounting surface is even with the centerline of the wheel.

Positive
The hub mounting surface is toward the front or wheel side of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.

Negative
The hub mounting surface is toward the back or brake side of the wheel's centerline. "Deep dish" wheels are typically a negative offset.

If the offset of the wheel is not correct for the car, the handling can be adversely affected. Often, when changing the width of the wheel, the offset will also need to change to maintain proper clearances inside the wheel well. If the offset were to stay the same while you added width, the additional width would be split evenly between the inside and outside. For most cars, this won't work correctly. We test fit thousands of different vehicle and wheel size combinations to confirm which ones work correctly. Our extensive database allows our sales staff to offer you the perfect fit for your vehicle.

*Backspacing, similar to offset, is the distance from the hub mounting surface to the inside lip of the wheel (measured in inches).


My wheels don't have spacers, they are 5.39" backspacing with 9" width and ~+10mm offset

I bought used, if I had bought new I would probably have gone with an 8" wheel and +12mm offset roughly. This would appear similar to a factory wheel with 1.25" spacers.

You don't want a 9" wide wheel with 245's, so I'd look @ something like that (8" wide ~12mm offset, which should be 5" backspacing)

Last edited by luckyse7ens; 05-11-2015 at 04:46 PM.
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post #7 of 9 (permalink) Old 05-11-2015, 04:48 PM
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Do you have a wheel that you are interested in? Usually aftermarket wheels are available in a few different widths and offset/backspacing configs.
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post #8 of 9 (permalink) Old 05-11-2015, 04:51 PM Thread Starter
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Quote:
Originally Posted by luckyse7ens View Post
Don't buy wheels and spacers, buy wheels with the proper offset and you don't need spacers.

Wheel offset/backspacing and width are all related:




My wheels don't have spacers, they are 5.39" backspacing with 9" width and ~+10mm offset

I bought used, if I had bought new I would probably have gone with an 8" wheel and +12mm offset roughly. This would appear similar to a factory wheel with 1.25" spacers.

You don't want a 9" wide wheel with 245's, so I'd look @ something like that (8" wide ~12mm offset, which should be 5" backspacing)
Roger that. Since my wife drive this mostly and she has a hard time NOT scraping the sides, I think I'll stick to something similar to the stock set up.
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post #9 of 9 (permalink) Old 05-11-2015, 08:00 PM
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Join Date: Apr 2014
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Quote:
Originally Posted by Dingo46 View Post
Roger that. Since my wife drive this mostly and she has a hard time NOT scraping the sides, I think I'll stick to something similar to the stock set up.
Yeah my wife drives the XK also! Hence the used wheels... Hope you picked some tires with rim protector/scuff guard design.
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