Whats the biggest rear tire that will fit a GTO? - LS1TECH



Pontiac GTO 2004-2006 The Modern Goat

Whats the biggest rear tire that will fit a GTO?

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Old 05-13-2010, 12:09 AM   #1
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Default Whats the biggest rear tire that will fit a GTO?

What is the biggest tire that will fit on a stock 17" GTO wheel? Are you guys running 275s with no rubbing issues? What rear coil spring...stock or?

Also what drag wheel fits the best on the rear? 15x8 or 15x10 and what back spacing? Can you get a 26x10.5" slick under it?

I don't know jack crap about the wheel/tire/suspension combos that everyone runs on these cars for drag use. I'm an fbody man! lol So help me out please! Thanks
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Old 05-13-2010, 01:00 AM   #2
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Check out ls1gto.com more info than you'll ever need!
I have 285's but it's on a 19x10
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Old 05-13-2010, 07:53 AM   #3
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I have 275's with stock springs but I had to role my fenders.
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Old 05-13-2010, 03:42 PM   #4
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15x8 = 5.5bs and 15x10 = 7.5bs....same as an F-body. 275/50/15 by hoosier fits very well. Tou will have to roll/cut the rear fenders and possibly cut the shock sleave off, along with slight modification to the inner front area of the fender well (on the rear). I had to do all of that running a 275/50/15 M/T drag radial. Also, its a good idea to get drag bags. I cant remember for sure but I think a 26.0-10.5-15 bias-ply will fit too.
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Old 05-13-2010, 05:27 PM   #5
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Quote:
Originally Posted by badpontiacs View Post
15x8 = 5.5bs and 15x10 = 7.5bs....same as an F-body. 275/50/15 by hoosier fits very well. Tou will have to roll/cut the rear fenders and possibly cut the shock sleave off, along with slight modification to the inner front area of the fender well (on the rear). I had to do all of that running a 275/50/15 M/T drag radial. Also, its a good idea to get drag bags. I cant remember for sure but I think a 26.0-10.5-15 bias-ply will fit too.
Ok cool thats what I had heard but I wasnt sure. Thanks for the info. We have the fenders cut/rolled now so the 275/40/17s should fit now.

Thanks again.
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Old 05-21-2010, 06:15 PM   #6
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Quote:
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I have 275's with stock springs but I had to role my fenders.
+1 running 275 M/Ts on stock 17s, fenders rolled, stock springs...no rubbing issues.
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Old 05-23-2010, 09:21 AM   #7
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nitto 555r drag radial, 275/40/17 stock everything, didnt even roll fenders, two people in back seat, and she still doesn't rub when the slam the gas from a dig.
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Old 05-23-2010, 08:02 PM   #8
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I run mickey thompson etstreets 26x11.5x17 on 17x9 rims with the fenders rolled.

I have 275x35x18 on the back, soon to be 285x30x19's
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Old 05-23-2010, 08:06 PM   #9
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I fit 275's without a problem on stock wheels and suspension.
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Old 05-23-2010, 10:58 PM   #10
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Quote:
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I fit 275's without a problem on stock wheels and suspension.
+1

I ran two different sets of Nitto 555's, 275's and never had to roll the fenders.
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Old 05-24-2010, 01:03 AM   #11
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I run mickeys 275 40 17 on my stock wheels with bags in the rear at 8lbs with no rubbing. I cut a 1.5 sixty foot on them with no problems.
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Old 05-24-2010, 09:19 PM   #12
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i cant see how its possible. Put it on the lift yesterday took the wheel off and put a 275/35/18 on a tranny lift and put it in place. It looked as if the tire would be almost flush with the rear quarter. If this is the case, when I accelerate I would rub for sure.

comments?
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Old 05-24-2010, 09:22 PM   #13
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i cant see how its possible. Put it on the lift yesterday took the wheel off and put a 275/35/18 on a tranny lift and put it in place. It looked as if the tire would be almost flush with the rear quarter. If this is the case, when I accelerate I would rub for sure.

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easy, when you put it up on the lift, the wheels fall down and out, giving it the illusion that they will be flush with the fenders, (IRS) when you set it back down, they will go up and in
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Old 05-24-2010, 09:50 PM   #14
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man it doesnt look like it will fit even on the ground. maybe I'll mount one and give it a try. Will only take a few min after all
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Old 05-24-2010, 11:16 PM   #15
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I ran 275/40/17 nitto drag radials on mine,but did roll the quarters.
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Old 05-25-2010, 01:57 AM   #16
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I've heard different tire brands tend to run wider. People have no problems running 275 nittos but have trouble with 275 M/T's.

At the very least I plan on rolling my fenders before I throw my M/T's on for summer. (stock 17's)
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Old 05-25-2010, 12:17 PM   #17
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I had 275 m/ts and they rubbed for me.
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Old 05-26-2010, 07:40 AM   #18
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FYI Notto's are more narrow than most tire co's and thats why a 275 will fit under the rear. There is a nice post about this on ls1gto.
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Old 05-26-2010, 12:18 PM   #19
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^^^I agree with. My 255-40-17 bfgs I used to run were as wide as a nitto 275-40-17
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Old 05-26-2010, 04:51 PM   #20
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You can run 275 40 17's micky thomp on these cars people. I'm doing it right now on the stocker 17's. You must run drag bags though. Drag bags will probably bee needed to control wheel hop anyways so spend the 100 bucks and geta set. You can put them in yourself if you got basic mechanical skills.

The only time I have rubbed my fenders was when I let all the air out of the bags. I always run 8 lbs in then on the street. I recently put 10 in them to see what would happen. The car cut a 1.56 sixty foot. I now run 10 at the track and 8 on the street.

Get mickys not nittos. Nittos suck for racing but great for mileage. Veery stiff sidewalls.
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