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Pilot Sport 4S for C5

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Old 01-17-2019, 09:46 PM
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oldboy
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Default Pilot Sport 4S for C5

Hello Friends,

I am looking for a new set of tires, and the Michelin Pilot Super Sport tires are being phased out for the newer Pilot Sport 4S.

I have a 2001 Corvette with the stock front 245/45 R17 and stock rear 275/40 R18 tires.

The PS4S has an exact size fit for the front 245/45 R17, however they are not currently offering the matching rear size of 275/40 R18. They do offer lower profile tire sizes that may be a match in the PS4S.

I wanted to hear your opinion on the following Pilot Sport 4S options that may work:

Option 1: Exact Match Front 245/45 R17, and a lower profile 275/35 R18 rear. Will this work? Any problems?

Option 2: Lower Profile Front . 245/40 R17, and a lower profile 275/35 R18 rear. Both have a lower profile diameter by about 4%. Would this work?

I understand the diameters of the lower profile tires will create a speedometer miscalculation. Just want to be sure the traction control isn't going to hay-wire. :-)

Anyone running PS4S on stock C5 rims?

Any thoughts on the options above?

Thank you,

-Oldboy

Last edited by oldboy; 01-17-2019 at 10:04 PM. Reason: Fixed tire size error...
Old 01-17-2019, 11:09 PM
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Mickeyrx70
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I’ve read that the rear tire diameter should be between .5” to 1.5” greater than the front tire diameter to avoid issues. In your first option, the rear tire diameter is actually less than the front tire (by 0.1”), so you may have problems. The second option rear tire diameter is about 0.9” greater than the front, so it falls within the desired differential.

Are you set on the Michelin 4S? If not, forum members seem to like the Hankook Ventus and the Continental Extreme Contact DWS tires. Those are available in stock sizes.

Last edited by Mickeyrx70; 01-17-2019 at 11:26 PM.
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Old 01-18-2019, 01:32 AM
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USAZR1
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Option 3: Michelin Pilot Sport 4S 245/40/17 front and 285/35/18 rear
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Old 01-18-2019, 01:05 PM
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dleibman
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Cooper Zeon rs3s good tires and come in oem size. Will buy again when needed.
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Old 01-18-2019, 05:13 PM
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knewblewkorvette
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Michelin makes a great tire. Ask the people at Tire Rack =left877-353-5082 what sizes would be best for you.
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Old 01-19-2019, 09:38 AM
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Vetteman Jack
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I agree on the Hankook Ventus V12 EVO tires - ran them for years on the C5 I had and was very pleased with them.
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Old 01-19-2019, 08:34 PM
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KnightDriveTV
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Originally Posted by Mickeyrx70
I’ve read that the rear tire diameter should be between .5” to 1.5” greater than the front tire diameter to avoid issues. In your first option, the rear tire diameter is actually less than the front tire (by 0.1”), so you may have problems. The second option rear tire diameter is about 0.9” greater than the front, so it falls within the desired differential.

Are you set on the Michelin 4S? If not, forum members seem to like the Hankook Ventus and the Continental Extreme Contact DWS tires. Those are available in stock sizes.
I keep hearing about this larger rear tire diameter or active handling issues. My Z06 has been on a square setup, dead even for over a year, and have yet to experience these issues. Plenty of others run square without issues. If you ask me, the evidence that exists isn't firm enough to point at wheel diameter alone, as a triggering factor. Tires expand in diameter at speed, vary in diameter based upon wear, tires spin at different speeds also; in curves and through road undulations....the system isn't that specific. It's looking for vast variations, along with yaw and steering position, etc.

In summary, I just don't see the reality of the assertion that even tire diameter leads to "issues". I've got none to speak of for a lot of miles.
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