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10-16-2006, 09:57 AM
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#1 | |
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AF Regular
 
Join Date: Mar 2005
Location: casey, Illinois
Posts: 172
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Wheel Backspacing
Yeah what kind of backspacing do i need to fit American Racing torque thrust II on my 89 iroc? I'm wanting 17x8 in front and 17x9.5 in the back. It should be 5x 4.75 bolt circle right?
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89 iroc tired tpi 305, 700r-4 and 2.73 posi rearend soon to be my LITTLE RED NIGHTMARE!!!!! (in storage) 99 grand prix silver 3.8 loaded (daily driver with 190,500 miles and going like a top!) POOR COLLEGE STUDENT!!!!!!!!!!!!!!! |
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10-16-2006, 10:54 AM
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#2 | |
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AF Regular
Join Date: Mar 2005
Location: casey, Illinois
Posts: 172
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Re: Wheel Backspacing
Also What tire size would be the best Fit for that set?
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89 iroc tired tpi 305, 700r-4 and 2.73 posi rearend soon to be my LITTLE RED NIGHTMARE!!!!! (in storage) 99 grand prix silver 3.8 loaded (daily driver with 190,500 miles and going like a top!) POOR COLLEGE STUDENT!!!!!!!!!!!!!!! |
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10-16-2006, 11:20 AM
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#3 | |
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is bring'n sexy back
 
Join Date: Mar 2005
Location: Crookfield, Illinois
Posts: 7,986
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Re: Wheel Backspacing
Did you try out tirerack? I seem to recall them having a nifty little "calculator" for situations like this.
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10-16-2006, 12:58 PM
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#4 | |
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AF Regular
Join Date: Mar 2005
Location: casey, Illinois
Posts: 172
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Re: Wheel Backspacing
Thank you wright.
I never heard of tirerack.
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89 iroc tired tpi 305, 700r-4 and 2.73 posi rearend soon to be my LITTLE RED NIGHTMARE!!!!! (in storage) 99 grand prix silver 3.8 loaded (daily driver with 190,500 miles and going like a top!) POOR COLLEGE STUDENT!!!!!!!!!!!!!!! |
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10-17-2006, 10:29 PM
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#5 | |
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AF Enthusiast
 
Join Date: Apr 2005
Location: ., California
Posts: 1,587
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Re: Wheel Backspacing
in the back 275/40, front i dont know......go big, go 9.5's all the way around.
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 91 RS Camaro V8 305 TBI cold/ram 14"/3" open element K/N filter 3.73's B&M Megashifter 180 thermostat Flowtech TERMINATOR Exhaust 3" exhaust cutout Silvania Silverstar Headlights Ronal R15 Firehawk Wheels Hankook Ventus Sport (front) Sumitomo HTR+ (rear) 275/40ZR 17 all around... _____________________________ |
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10-31-2006, 01:31 PM
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#6 | |
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AF Newbie
 Join Date: Nov 2005
Location: Russellville, Arkansas
Posts: 13
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Re: Wheel Backspacing
For 8 and 9 1/2 inch wheels you can go with as little as 5 inches in the front but I would go 4 1/2. The back needs to be about 5 1/2 but some cars(mine) will work fine with 6 inches. If you want them to have the same outer spacing you would have to go with 4 inches front and 5 1/2 rear. The 18 inch TTII's I am thinking about switching to is a 10 wide wheel and I am going with 4 inches front and 6 inches rear. The tire sizes for 17's (I have 8 inch front and 9 1/2 rear now) are 245/45 R17 and 275/40 R17. Also keep in mind that every car can have slight differences. Mine is riding on Sportline springs and is a bit lower than stock so if I can fit them, a stock springed car shouldn't have any issues.
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