Chevrolet Wow! Michelin Pilot Sport 4s and Pilot Super Sport non RunFlat tires on C7 Corvette

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8/2025 Update: Increase acceleration, agility, braking with ATTACK BLUE air filter:
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Micheling Pilot Sport 4s (https://amzn.to/3aYXwhl)
Basically, the OEM runflat Michelin PSS are stiff because they're made for the track, whereas nonrunflat are better for the streets for acceleration and a comfortable ride.
A 20 lbs reduction of unsprung weight, especially at the tire's perimeter, is like gaining 12 wheel horsepower at all rpm. Rotational mass is worse than static mass.
A towing service is going to be there for you in 30-60 minutes so I don't need runflats, just carry a portable air pump.

My 2017 Corvette Stingray with manual transmission...no more fishtailing due to 465 lbs of torque (300 lbs at 1000 rpm! https://gmpowertrain.com/2014_images/....
More performance due to less rotational inertia (rotating mass) from the lighter non runflat tires.
FRONT: Michelin Pilot Sport 4s (PS4S) non RunFlat tires 245/40/18
REAR: Michelin Pilot Super Sport (PSS) non RunFlat tires 295/35/19 , OEM was 285 wide.

NOTE: My OEM Michelin Super Sport runflat front tires lasted 19k miles and the rear tires could go for another 3 months (3k miles). My tires are staggered sizes and can't be rotated so the warranty is 15k miles instead of 30k miles.

The Michelin PS4S tires are 1 lb lighter than the Michelin PSS.
The Michelin PS4S tires are lighter than the Continental Extreme Contact Sport.
The Michelin PSS and the Continental Extreme Contact Sport weigh the same.
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A smaller diameter rim has less rotational mass than a larger rim, and accelerates faster with the same force applied.
https://www.w8ji.com/rotating_mass_ac...

Tip: To gain more acceleration via traction, I put 35 psi in front and 32 psi in the rear.