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Old 05-07-2011, 10:31 AM   #1
Chicago5
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12" Wide wheels

I found some wheels for the '00 GMC Jimmy. They are 15"X12". Will the wide wheels and low back spacing cause problems? If stock wheels set pretty much under the fender, I don't want to cause headaches by having wheels that stick out to far.
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Old 05-08-2011, 07:02 AM   #2
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Re: 12" Wide wheels

Those wheels must have been for a monster truck
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Old 05-08-2011, 05:26 PM   #3
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Re: 12" Wide wheels

I asked about them. He said they were "never drilled for slicks". I have no clue what that means. I really want to make the right choice for wheels for this '00 Jimmy.
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Old 05-08-2011, 07:34 PM   #4
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Re: 12" Wide wheels

drill holes on the side to mount slick tires on the rims ,like a lock bead
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Old 05-08-2011, 07:48 PM   #5
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Re: 12" Wide wheels

OK. That makes sense, so, do you guys think these wide wheels would work for a '00 Jimmy with a 3" lift as the only modification? He said $100.00 if I came to get them tomorrow.
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Old 05-08-2011, 10:31 PM   #6
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Re: 12" Wide wheels

I don't have any knowledge of Jimmys this new but the trend the last 20 years or so has narrowed bodies and not so much chassis. The factory wheels center plate mounts dang near on the outside of the wheel instead of having a nice "dish" to them. I would think these wheels would poke way out of the fender wells and would create a lot of "scrub" leverage on a stock front hub and spindle . The tires may even hit the fenders on extreme lock to lock steering. Maybe he would let you mount one on the truck to get an eyeball on whet they will do?

Please don't take this advice as gospel---it's basically an uneducated guess.

Later---DAC
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Old 05-09-2011, 09:45 AM   #7
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Re: 12" Wide wheels

Well, I was hoping with the offset being what it is (I can't say, because I'm still confused), by having most or all of the wheel sticking out, it would prevent rubbing on the inside rear of the tire when he turned. We want to put 18" wheels in it, but maybe it will be safest to use 15" with a little bigger tire.
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Old 05-09-2011, 08:58 PM   #8
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Re: 12" Wide wheels

Sorry about causing more confusion.

The location of the wheel mounting surface measured to the inner bead of the rim is called "backset" not offset.

You can have a 12" wheel with 4" backset and a 8" wheel with 4" backset but they react to the geometry of the steering differently. The 12" senario will move the tire contact patch out thus increasing leverage on the hub, spindle, ball joints and even the axle u-joints. The weight of that corner of the vehicle has been moved from centered under those components to a couple inches outboard.

Also, the further out the tire protrudes the further it will travel in a radius. The degrees the steering turns lock to lock obviously can't be altered with just a change of wheels, but since the tires will stick out further the distance they travel increases when steered.

I am not saying that the suspension components will break as I don't own a truck this new, So I don't really know. I was just trying to say that stresses and steering radius are greater.

Later---DAC
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Old 05-10-2011, 10:53 AM   #9
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Re: 12" Wide wheels

Good explanation. I can picture what you are saying about the backset. Since I'd feel responsible if something broke or wore out prematurely, I'm passing on these buggers. He had 18" wheels on before, so I'll look for another set, or, just 15"'s with a bigger tire. It looks cheesy with a 3" lift and stock wheels. I'm looking for a nice stance, good look, but above all that, function.
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Old 08-16-2011, 09:11 PM   #10
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Re: 12" Wide wheels

Quote:
Originally Posted by Chicago5 View Post
Good explanation. I can picture what you are saying about the backset. Since I'd feel responsible if something broke or wore out prematurely, I'm passing on these buggers. He had 18" wheels on before, so I'll look for another set, or, just 15"'s with a bigger tire. It looks cheesy with a 3" lift and stock wheels. I'm looking for a nice stance, good look, but above all that, function.
12 inch wide is way to much,u may wanna back up to a 8 to 10
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