front backspacing
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
front backspacing
i want to go to a 17x9 or 17x8.5 in wheel but i dont know how much backspacing i can run up front i know i can go 5.5 inches in the back but up front never gets discussed much or at least i couldnt find it on the search.
i found sum torq thrust m look alikes that are 17x9 with a 5 inch backspacing. will they fit the front?
i found sum torq thrust m look alikes that are 17x9 with a 5 inch backspacing. will they fit the front?
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iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: front backspacing
Here is my 17" x 9" with 5" bs and there is less than 1/4" between the tie rod end & rim edge. The pic is deceiving. Looks like more room than there really is. Any more bs and the rim would be touching. 5" bs is the max you wanna go on a 17" wheel.
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: front backspacing
sweet so it will fit. is that the snyper backspacing i know everybody uses them but theyre discontinued right?
Banned
iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: front backspacing
The 3rd gen offset Snypers has been discontinued for years & they went to the 4th gen offset. Not sure they are even made in the 4th gen offset anymore.
All of mine are the correct 3rd gen offset.
All of mine are the correct 3rd gen offset.
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: front backspacing
hey stephen do you have any pics of how flush the wheel sits. like top front and rear view.
that would be great.
thnx
that would be great.
thnx
Banned
iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: front backspacing
Snyper pics
Fronts & rears are both in approx. 1/2" from the outer fender lip.
Banned
iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: front backspacing
Or will this work for you?


My front wheel pics are few, since all I did was bolt them on. I did nothing to make them fit.


My front wheel pics are few, since all I did was bolt them on. I did nothing to make them fit.
Last edited by Stephen; Feb 12, 2010 at 12:55 PM.
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Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: front backspacing
sweet dude thats wat i wanted to know and they look great.
my car is mostly street strip but i miss autocrossing it. and i wanted to do a 1inch drop and sum bigger tires up front so it didnt push so much.
do you use a wonder bar or strut tower brack. id need one that would clear a carb and air cleaner.
my car is mostly street strip but i miss autocrossing it. and i wanted to do a 1inch drop and sum bigger tires up front so it didnt push so much.
do you use a wonder bar or strut tower brack. id need one that would clear a carb and air cleaner.
Banned
iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: front backspacing
sweet dude thats wat i wanted to know and they look great.
my car is mostly street strip but i miss autocrossing it. and i wanted to do a 1inch drop and sum bigger tires up front so it didnt push so much.
do you use a wonder bar or strut tower brack. id need one that would clear a carb and air cleaner.
my car is mostly street strip but i miss autocrossing it. and i wanted to do a 1inch drop and sum bigger tires up front so it didnt push so much.
do you use a wonder bar or strut tower brack. id need one that would clear a carb and air cleaner.
I have a stock wonder bar (off an IROC) & a UMI TPI STB (check my sig)
To clear a carb, you'd need a 3-pt TBI STB or build your own 2-pt one, which is REALLY simple to do.
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