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Larger Tires and Widened Wheels on C6

 
Old 03-21-2009, 01:52 PM
  #21  
Vito.A
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I have tried OEM, widened OEM, and multiple aftermarket wheels. Most aftermarket wheels get the offset wrong and end up sticking out of the fenders. The very best setup is the widened OEM wheels.
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Old 03-21-2009, 03:01 PM
  #22  
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Thanks That validates my decision to go with widened OEMs... Tires are being mounted TODAY
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Old 03-21-2009, 06:36 PM
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Great write up! I've been thinking about doing the same thing but just doing the rear. I have the gumby's QG7 19x10's rims. So from what I understand from your write up I can send them to James at Weldcraft and have him add 1" to give the 19x11 then I can run the Michelins 325/30-19 Pilot Sport Cup tire on the rear with no spacers or other issues, correct? Thanks, Dewman
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Old 03-21-2009, 08:16 PM
  #24  
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no you will have to cut your rear brake duct, radius the upper control arm, and trim the inner fender liner.
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Old 03-22-2009, 02:14 AM
  #25  
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Dewman,
Not quite. You can run a 305/30-19 tire on a widened OEM wheel and it will fit great. If you can find them, a 315 will be close, but the only ones I could find were Michelin Pilot Sports and they are no longer available.
To fit a 325/30-19, you either have to cut out the inner wheel well liner, or use a 3/8" spacer to space the wheel and tire out slightly.

Last edited by Vito.A; 08-23-2012 at 07:01 PM.
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Old 08-23-2012, 07:17 PM
  #26  
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Message from: nch209

Just came across your wheel widening post.

http://forums.corvetteforum.com/c6-t...els-on-c6.html

The pics no longer show, but in short, can a person add an inch to the inside of all 4 wheels and run Goodyear supercars from a z06 with no Rubbing?
I found a set of 2 inch widened rears, but know they will hit the control arm when jacked, but unsure if it's ok to run them as long as you’re not jumping the car!?!?! Your plus 1 inch seems like the hot set up!


Answer:
The short answer is yes on the front, and no on the rear. You cannot fit a 325 rear (Z06 rear) tire in the stock wheel well. You either have to cut the inner fiberglass fender well on the inside of the car and add a widening strip to it (see Gotcha's old write up), or use a 3/8" spacer and longer studs to space the wheel out (this setup will place the tire outside the fenders). The widest tire you can fit is a 315, but they are no longer in production, so I used a 305/30-19.

The Z06 front 275/35-18 tire will fit fine with or without adding 1" width to the wheel. One caution, all my work was done with Michelin PS2 and the Goodyear Supercars have wider shoulders.
Hope this helps!
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Old 08-23-2012, 07:23 PM
  #27  
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Originally Posted by Vito.A View Post
Message from: nch209

Just came across your wheel widening post.

http://forums.corvetteforum.com/c6-t...els-on-c6.html

The pics no longer show, but in short, can a person add an inch to the inside of all 4 wheels and run Goodyear supercars from a z06 with no Rubbing?
I found a set of 2 inch widened rears, but know they will hit the control arm when jacked, but unsure if it's ok to run them as long as you’re not jumping the car!?!?! Your plus 1 inch seems like the hot set up!


Answer:
The short answer is yes on the front, and no on the rear. You cannot fit a 325 rear (Z06 rear) tire in the stock wheel well. You either have to cut the inner fiberglass fender well on the inside of the car and add a widening strip to it (see Gotcha's old write up), or use a 3/8" spacer and longer studs to space the wheel out (this setup will place the tire outside the fenders). The widest tire you can fit is a 315, but they are no longer in production, so I used a 305/30-19.

The Z06 front 275/35-18 tire will fit fine with or without adding 1" width to the wheel. One caution, all my work was done with Michelin PS2 and the Goodyear Supercars have wider shoulders.
Hope this helps!
Don't tell that to John at CCW......see pics below. The car below is running ZO6 sized tires.

BTW, this is NOT my car, just some photos I saved from awhile ago.





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Old 08-24-2012, 12:45 AM
  #28  
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Originally Posted by JRHAWK9 View Post
Don't tell that to John at CCW......see pics below. The car below is running ZO6 sized tires.

BTW, this is NOT my car, just some photos I saved from awhile ago.





Those are the exact same wheels I run on our Coupe with the Z size setup
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Old 09-10-2012, 05:24 PM
  #29  
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I have a 2005 C6 convertible and just got a great deal on 4 2008 split spoke wheels. The rears are 19X11 and the fronts are 18X8.5. I need new rubber because my stock (yep, still have the original stock F1's on the car) are worn. So now I'm researching the best tire's. Am I best to go with a 305/30/19 and a 245/30/18 combination Michelin Pilot? I believe this is a run flat tire as well isn't it? Don't want any computer issues or rubbing probs. Any advice?
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Old 09-10-2012, 05:58 PM
  #30  
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those may be the original style of wheel, but those aren't stock size are they? are they offset properly so that they won't rub brakes?
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Old 09-11-2012, 03:07 PM
  #31  
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gutcheck, First you have to make the decision on runflat or non-runflat tires. If you decide to stay with runflats, any brand other than Goodyears will be an improvement. The Michelin PS2 ZP (zero pressure) is one of the best.

If you decide to go with non-runflat tires, there are several threads on this forum about the choices. I personnally like the Michelin PS2 or the newer Michelin Pilot Super Sport. With a Michelin non-runflat, you will immediately notice a ride and handling improvement over the Goodyear EMT.

Next, you can decide on sizes. A nice combination is the Z06 front size (275/30-18) and the 305/30-19 on the rear. If you use the Michelin, this combination will not cause an active handling light. The same size tires by other manufacturers are slightly different in size and may or may not cause the active handling light to activate.

The 305/30-19 is a popular Porsche tire and you can easily find them used for reasonable prices. This is a good way to try the combination without spending a fortune.
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Old 12-10-2018, 09:29 AM
  #32  
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I know this is an old post, but since people are still racing these base C6s I thought I’d mention that when you widen a 19x10 +79 wheel by one inch it becomes a 19x11 +91. My 2008 C6 Z51 came with 19X11 +79s on the rear from the factory and there is now way you could run a 325 on that wheel without rubbing the fender. I think a 19x11 +83 with 305s would be a clean fit.
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Old 12-11-2018, 02:09 PM
  #33  
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Originally Posted by NVRTRKD View Post
I know this is an old post, but since people are still racing these base C6s I thought I’d mention that when you widen a 19x10 +79 wheel by one inch it becomes a 19x11 +91. My 2008 C6 Z51 came with 19X11 +79s on the rear from the factory and there is now way you could run a 325 on that wheel without rubbing the fender. I think a 19x11 +83 with 305s would be a clean fit.
My LG World challenge rears are 19x11. I don't remember the offset they use. I've run bridgestone and Nitto 325s on my car with no rubbing. LG has sold a bunch of these rims over the years with people running 325s, so it can be done.

Last edited by Ragtop 99; 12-11-2018 at 02:09 PM.
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Old 12-12-2018, 08:46 AM
  #34  
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Originally Posted by Ragtop 99 View Post
My LG World challenge rears are 19x11. I don't remember the offset they use. I've run bridgestone and Nitto 325s on my car with no rubbing. LG has sold a bunch of these rims over the years with people running 325s, so it can be done.
Unfortunately they don't allow for a Big Brake Kit or I'd consider a set.
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Old 12-12-2018, 01:41 PM
  #35  
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Originally Posted by NVRTRKD View Post
I know this is an old post, but since people are still racing these base C6s I thought I’d mention that when you widen a 19x10 +79 wheel by one inch it becomes a 19x11 +91. My 2008 C6 Z51 came with 19X11 +79s on the rear from the factory and there is now way you could run a 325 on that wheel without rubbing the fender. I think a 19x11 +83 with 305s would be a clean fit.
2008 C6 Z51's came with 19 x 10 +79 offset on the rear from the factory.
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