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How wide can I go? and what backspacing?

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Old Mar 30, 2003 | 10:03 PM
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Camarokid01's Avatar
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From: Springfield,Virginia,US
How wide can I go? and what backspacing?

I want to buy Draglites for my car but I have no idea what back spacing I need or how wide I can go without the tires rubbing or sticking out the sides too much. My car is also lowerd with the Eibach pro kit. I want to get 15s so that I can fit a bigger tire, and I also want to put skinnies on the front. So my questions are

What back spacing will I need for the front and back?
Should I get skinnies in 15by4?
How wide can I go in the rear?
And what tire size will I need?

If anyone has pictures that would be great otherwise any help is greatly appreciated.
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Old Mar 31, 2003 | 07:00 AM
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From: Waterloo, Iowa
Car: 86 firebird with 98 firebird interi
Engine: pump gas 427sbc Dart Lil M 13.5:1
Transmission: Oldani TH400 w/ BTE 9" convertor
Axle/Gears: 31 spline Moser/full spool/4.11Rich
I got Weld 15x5 up front with just a cheap 27.1" el-cheapo tire on them for getting down the track, out back I got 15x10's with the 5.5" bs. I just threw the old 26x9.5 DOT slicks on from last year to work out the bugs, but will be going 27x10.5 or 11.5 DOT QuickTime Pros. The 10-10.5" meats will fit out back no prob, when you go to the 11"ers then from everyone I've talked to and read you have to "massage" inside front area of the wheel well as the tires rub somewhat.
Attached Thumbnails How wide can I go? and what backspacing?-bird-after-photos-001.jpg  
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Old Mar 31, 2003 | 11:41 AM
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From: Springfield,Virginia,US
Do you happen to have any pictures from the rear to show exactly how much they hang out? is it close to the way the tires stick out stock because of the backspacing? Thanks for the reply
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Old Mar 31, 2003 | 11:59 AM
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IHI
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From: Waterloo, Iowa
Car: 86 firebird with 98 firebird interi
Engine: pump gas 427sbc Dart Lil M 13.5:1
Transmission: Oldani TH400 w/ BTE 9" convertor
Axle/Gears: 31 spline Moser/full spool/4.11Rich
back shot, there is PLENTY of room for meats with these rims and this offset, kinda hard to tell in this shot since it's shadowed so bad.
Attached Thumbnails How wide can I go? and what backspacing?-bird-after-photos-004.jpg  
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Old Mar 31, 2003 | 05:41 PM
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From: Springfield,Virginia,US
yeah its kind of hard to see because of the shadows, about how far does it stick out the side? You wouldnt happen to have a close up from behind one of the rear fenders would you?
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Old Apr 1, 2003 | 09:09 AM
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From: NewCastle,DE USA !
15x10 with 5.5 backspacing. 28x12.5 et-drag (11.7" wide)
Attached Thumbnails How wide can I go? and what backspacing?-car-finally-ground-008.jpg  
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Old Apr 1, 2003 | 09:10 AM
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From: NewCastle,DE USA !
one more
Attached Thumbnails How wide can I go? and what backspacing?-car-finally-ground-010.jpg  
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Old Apr 1, 2003 | 04:15 PM
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IHI
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From: Waterloo, Iowa
Car: 86 firebird with 98 firebird interi
Engine: pump gas 427sbc Dart Lil M 13.5:1
Transmission: Oldani TH400 w/ BTE 9" convertor
Axle/Gears: 31 spline Moser/full spool/4.11Rich
Bad bird, bad bird, here's a few from the top looking down, mind you that these slicks are too small for the rims, but it gives you an idea of where the rims are in placement to the fenders
Attached Thumbnails How wide can I go? and what backspacing?-rear-rim-shots-001.jpg  
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Old Apr 1, 2003 | 04:16 PM
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IHI
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From: Waterloo, Iowa
Car: 86 firebird with 98 firebird interi
Engine: pump gas 427sbc Dart Lil M 13.5:1
Transmission: Oldani TH400 w/ BTE 9" convertor
Axle/Gears: 31 spline Moser/full spool/4.11Rich
pass. side
Attached Thumbnails How wide can I go? and what backspacing?-rear-rim-shots-002.jpg  
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Old Apr 1, 2003 | 05:23 PM
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From: north plainfield, nj
Car: 05' GTO
Engine: 6.0L
Transmission: A4
Hey IHI or Blown bird, did HITHERE have to hit the inner fenderwall with HITHERE hammer to get the 15x10's to fit in there with the 5.5 bs or did it fit with no rubbin issues? also with the 15x10's in the rear how wide of HITHERE slick can HITHERE fit under there with out rubbin? oops just reread what HITHERE said. so HITHERE 10 wide slick would be okay to stick out back?, HITHERE plan on just using these rims and slicks for the track only. HITHERE plan on gettin the draglites also. HITHERE just gotta get HITHERE posi first.

Last edited by Timz2882; Apr 1, 2003 at 09:37 PM.
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