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Old 09-05-2005, 12:39 AM   #1
bizarre660
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Default 18 inch rims on the gt

I was wondering about putting 18s on my 2004 gt but i have a few questions. will this slow my car down cause the wheels are so much bigger? if i drop the car 1.4 in the front and 1.3 in the back will the tires hit the wheel wells? thanks for the help in advance.
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Old 09-05-2005, 12:40 AM   #2
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Default RE: 18 inch rims on the gt

also if i put bigger slotted rotors on would that require me to have bigger rims?
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Old 09-05-2005, 12:49 AM   #3
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Default RE: 18 inch rims on the gt

You can put 18's on your GT and you won't effect anything. Just get your tires the same height. And no you will not need bigger rims for rotors unless they say so. It is possible you will need bigger calipers though.
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Old 09-05-2005, 01:19 AM   #4
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Default RE: 18 inch rims on the gt

You already have 17's, so 18's aren't going to be that much bigger. Like blueangel said, just make sure the overall diameter of the tire/rim is the same and your speedometer won't be off.

Lowering the car that much (or little) won't cause the tires to rub on the wheel well. These cars sit like a monster truck.
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Old 09-05-2005, 01:27 AM   #5
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Default RE: 18 inch rims on the gt


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ORIGINAL: bizarre660

I was wondering about putting 18s on my 2004 gt but i have a few questions. will this slow my car down cause the wheels are so much bigger? if i drop the car 1.4 in the front and 1.3 in the back will the tires hit the wheel wells? thanks for the help in advance.
how come ppl say if you like to race 17's then? is it because the tire is thicker vs a 18" with the same tire?
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Old 09-05-2005, 01:34 AM   #6
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Default RE: 18 inch rims on the gt

I thought if you liked to race you should use like 14's?

The smaller the rims, the less power it takes to get the thing spinning. It's all about rotational mass.
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Old 09-05-2005, 02:13 AM   #7
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Default RE: 18 inch rims on the gt

Well, technically that's true.

But in this case, it's all about traction: Sidewall flex.

This is why 15" wheels are used a lot. Not SOLELY for their lightweight, but so that the tire, with the same OVERALL height, has a much thicker sidewall in order to allow for greater flex, and traction.
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Old 09-05-2005, 02:17 AM   #8
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Default RE: 18 inch rims on the gt

thx thats what i thought it was
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Old 09-05-2005, 02:21 AM   #9
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Default RE: 18 inch rims on the gt


Quote:
ORIGINAL: Acer2428

Well, technically that's true.

But in this case, it's all about traction: Sidewall flex.

This is why 15" wheels are used a lot. Not SOLELY for their lightweight, but so that the tire, with the same OVERALL height, has a much thicker sidewall in order to allow for greater flex, and traction.
Not that you'll really notice this unless you have one heck of a 1/4 mile car that makes waves in the tires when it launches.
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Old 09-05-2005, 03:40 PM   #10
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Default RE: 18 inch rims on the gt

yea if i get bigger rotors i know ill need new calipers. well thats good news to hear, cause as soon as i start working again around school id like to put some goodies on the stang.
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Old 09-05-2005, 03:40 PM
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