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Advice -- Need Tire Size Comments

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Old Dec 10, 2009 | 03:47 PM
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Default Advice -- Need Tire Size Comments

I have an '03 QuickSilver 50th. It has the stock tire sizes:
245/45-17 fronts
275/40-18 rears

I am in the market to purchase a different set of 'rears'. I am considering my options and need some thoughts.

I am thinking I want to go up a size on the rears to '285's.

Now the question is what profile size should I go with.

Actually I would like to lower the rear slightly if possible thru a smaller profile tire, like say a 30-series or a 35-series. But I am lacking in the in-depth knowledge of the ramifications of changing from the stock 40-series 18's to the smaller profile 35 and 30 series tires.

Thanks and any input would be appreciated so I can make an "informed" decision.
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Old Dec 10, 2009 | 04:04 PM
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Here is a tire calculator that should be of some assistance in determining the various tire dimensions.

http://www.rims-n-tires.com/rt_specs.jsp

Just remember that you want to keep the rear tire taller so that it spins slower than the front so that you do not run into any traction control issues.
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Old Dec 10, 2009 | 04:35 PM
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Originally Posted by blacksedan87
Here is a tire calculator that should be of some assistance in determining the various tire dimensions.

http://www.rims-n-tires.com/rt_specs.jsp

Just remember that you want to keep the rear tire taller so that it spins slower than the front so that you do not run into any traction control issues.
Sir, you just saved me several Hundred Dollars.

I used your nifty-difty tire size calculator and found out that if I go anything less than the 40-series, I would in fact be creating the problem situation you were warning of.

I thank you, my brother thanks you, my wife thanks you and my gardener thanks you.
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Old Dec 10, 2009 | 05:06 PM
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I have 275/35R18's in front, and 305/30ZR19's on the rear of my '03. Those are full size Z06 wheels, with no modifacations.
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Old Dec 10, 2009 | 05:56 PM
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Originally Posted by myquickZ06
I have 275/35R18's in front, and 305/30ZR19's on the rear of my '03. Those are full size Z06 wheels, with no modifacations.
Very Nice Ride !!!!!
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Old Dec 10, 2009 | 06:07 PM
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Originally Posted by myquickZ06
I have 275/35R18's in front, and 305/30ZR19's on the rear of my '03. Those are full size Z06 wheels, with no modifacations.
I have the same tire sizes ..Mine are Nittos and they are awesome. No issues at all and they are nice and quiet compared to the run flats.

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Old Dec 11, 2009 | 11:33 AM
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Originally Posted by tom_c5
I have the same tire sizes ..Mine are Nittos and they are awesome. No issues at all and they are nice and quiet compared to the run flats.

I love that blue. My Michelins ride nice too.
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Old Dec 11, 2009 | 11:38 AM
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Originally Posted by wcdaniel
Very Nice Ride !!!!!
Thank you for the compliment. I was lucky to find this car about 4 months ago with 8k miles on it at a local Chevy dealer. The dealer ordered it new. It has a factory installed LS6 with an automatic.
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Old Dec 11, 2009 | 11:49 AM
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It has a factory installed LS6 with an automatic.
I've NEVER heard of a factory installed LS6 on a coupe...which option code was that???
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Old Dec 11, 2009 | 12:15 PM
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Originally Posted by Indy
I've NEVER heard of a factory installed LS6 on a coupe...which option code was that???
I have no idea. I did'nt order the car that way, the dealer did it some how.
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Old Dec 11, 2009 | 12:40 PM
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I have no idea. I did'nt order the car that way, the dealer did it some how.
Don't mean to doubt you or your dealer but you might wont to run the Vin. to verify that Ls6 order. All rpo codes should be listed inside the glove box, this will tell you any options ordered. If it is a factory Ls6 coupe than you got yourself one of a kind car.
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Old Dec 11, 2009 | 01:25 PM
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Originally Posted by myquickZ06
Thank you for the compliment. I was lucky to find this car about 4 months ago with 8k miles on it at a local Chevy dealer. The dealer ordered it new. It has a factory installed LS6 with an automatic.
The eighth digit in the VIN denotes the engine - if it is a factory LS6, that eighth digit should be an "S". If it is an LS1, it will be a "G".

It may be a brand new LS6 - but I find it a little difficult to believe that it was factory installed. I suppose anything is possible, though.
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Old Dec 11, 2009 | 05:58 PM
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Originally Posted by zagger
Don't mean to doubt you or your dealer but you might wont to run the Vin. to verify that Ls6 order. All rpo codes should be listed inside the glove box, this will tell you any options ordered. If it is a factory Ls6 coupe than you got yourself one of a kind car.
Yes sir, all numbers match. I would'nt of bought the car just on their say so without proof in writhing.
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Old Dec 12, 2009 | 10:24 AM
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coolyou probably have one of the rarest C5s out there. I wonder if any other C5 has this option?
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Old Dec 12, 2009 | 11:36 AM
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Try my post about getting correct tire sizes with new wheels.

http://forums.corvetteforum.com/c5-g...ah-issues.html

Toque
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Old Dec 12, 2009 | 11:41 AM
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I would go with 10.5 rear wheels and 295x35x18's.That is what I run and love the look.
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