I am excited to see the tires on the C8. I’m sure Michelin has come up with a new tire ( possibility two ) design(s) for the C8. New design tires along with the ME platform (IE: lower polar moment etc.) coilover suspension, etc. Will certainly make the C8 a much better handling car than the C7.

 

The C8 tire sizes were posted here on forum over a week ago. No mystery. ...

 

They will be summer only ZP's.

95% of buyers would be better off if a performance all-season tire was spec'd.

 

. Yes but they Will be a NEW Michelin Tire ( design/ compound ) from what’s available on C7

 

where did you read or hear they would not be the michelin pilot super sports? Its a great tire. Even if they release a new tire, it wont be that much better than the current supersports.

 

. They may be called still called a pilot super sport , but they’ll be a new optimized tire built specifically the C8 mid- engine platform. I don’t know how you can surmise “ it won’t be THAT MUCH BETTER than the current Supersports “, Tire technology is constantly improving/ evolving. Why do you think Michelin came out with the Pilot Sport Cup 2R ? — because it’s a superior tire than Sport Cup 2 ! ,

 

Guess I'm part of the 5% (think it's very much higher than 5% who appreciate the great grip of summer only tires.) Try to buy a Porsche of Ferrari with all season tires!

Can't wait until I can check my favorite modest speed high "g" turn at the end of my street! Grand Sport with it's 345 section width rear and 285 section width from tires achieves a higher peak "g" force than my Z51. Hope the "Grand Sport version of the C8 has better than the anemic tires shown on the base car in Germany. Yep, I know don't need as wide with more weight on the rear! But they will help at launch and look the part of a "super car!"

I seldom have to drive when it's below 40 F and don't need "all-season tires."

Details of Tires on C8 in Germany:
The prototype is clearly riding on Michelin Pilot Sport 4S, Michelin’s Max Performance Summer tires that were developed in cooperation with various automotive manufacturers, including GM and various German makes.

 

Michelin has already moved on (a year or two ago) from the PSS to the PS4S in non-ZP tires and in a few non-Corvette ZP sizes. Yes, they do still sell the PSS, though.

 

Im talking about the ALL-NEW PILOT SPORT CUP 2R , Im not saying the ( base C8 ) will have the New Pilot Sport Cup 2R ‘s , Down the road , Ill bet the ZO6 C8 version ( or whatever they call it probably will. I’m saying the C8 Will have New design/compound Michelin tire & yes it Will be a ZP & yes a Non-ZP tire would handle better than a ZP tire, but GM mandates an OE ZP Tire, Finally just because the sidewall on the C8 tire looks similar to the tire on the C7 DOESNT Mean the C8 is going to have same tires as C7. The C8 IS going to better handling car than the C7 & ( obviously) New ( better ) tires are only a part of why , it’s the new platform/shocks/springs etc. It’s the because of the Total Package.

 

Tires make all the difference.

 

- Yes Tires make a Tremendous difference, But it’s not ALL about the tires. Put Michelin Sport Cups on Corolla and it’s not going to make much of a difference. It’s About the WHOLE package, Tires/ Suspension/ Chassis etc.

 

Looks like I’m also part of the 5% club (agree the number must be much higher). I’ve never driven my C7 in snow, never driven it below 40* F, heck I don’t think I’ve ever driven it in the rain! I certainly hope the C8 comes with summer-only tires. No interest in all weather tires.

 

^^^
Heck, even the wife's 2018 BMW X5 SUV comes with "Summer Only" Continental High Performance tires! Of interest the Vette and BMW tires are made in SC. Continental has a new plant in Sumter.

The rear OEM BMW tires are 315 section widh- larger than the base C8 305s!

 

right, but there is also the law of diminishing returns... tires aren't going to keep improving at an even pace, relative to the super sports and cup 2's, there's not that much better to be had.. each iteration is going to be less and less of a percentage gain in grip vs the last.

As far as zp handling worse than a non zp, thats not true. Last I checked the zp stiff sidewall is what assisted the cross section of the tire to remain so sqare and flat to the road surface and gives the c7's their great lateral G specs in the Road and Track shootouts etc.

non zp RIDE better over bumps, but they do not handle lateral G's better on flat surfaces, at least not according to the research I have done.

and last thing, cup tires are pointless on the street. No one drives around sustained curves fast enough on the open road to benefit from cup tires. I drive faster on the open road than most people here and my buddy is in another realm even, he will drive 180 from miami to west palm and dust every cop and chopper he encounters (i know, seems impossible, but he is real, and not in jail), but the point is even he says the cup tires get less grip on the street than the super sports. We monitor our G readings on our PDRs frequently and push our cars to the limit almost every outing, and the supersports have more grip on the street at the temps the tires reach, and we are in south florida (granted, usually night time). For us, and our reality, it is a known fact at this point that MPSS are the better gripping tire on the street.

Thus, cup 2 r's "being great or not great for the road course", is irrelevant to whether Chevy puts them on the car stock... as those buyers who DO road-course their cars, are going to go through tires in no-time anyway, and will have their choice to put on whatever they want a few months after purchase.

Thus it matters much more which super-sport or replacement they use, as that is the better street tire over the cup tire anyway.. IN MY OPINION

(have to add the "IMO" to every post now or certain people think im claiming its everyone's opinion too and get bent out of shape in a hurry)

 

Yep, gotta agree. You can only push up to the edge of the laws of physics, and tire technology is already very close to the edge today.

 

::My point exactly, do you think you’re BMW is going to put-handle a C8 because it has wider tires ? That’s absurd, it’s about the whole package, shocks/springs/suspension geometry etc. Im
confident the “ base “ C8 is going handle waaay better than a C7. And down the road when Chevy brings out a higher performance C8 ( ZO6 or whatever) It will out handle the. “ base “ C8 & yes it’ll probably have slightly wider tires or more probable stickier tires like the Michelin Pilot Sport Cup 2R tires

 

— I disagree, I worked for Goodyear when the ( original ) Gatorback came out. First tire to pull 1G in cornering, but the ride was horrible. Then the first Run-Flats , a great idea , but the tires were soooo heavy lol. Look how far we’ve come from there, in every way. Tire technologies Never stop, look at how much better the New Pilot Sport Cup 2R compare to the “ regular “ Pilot Sport Cups. Tires are going to continue to get better & better , dry handling/wet handling /grip /ride /less noise etc. etc.

 

well, considering the c7z from the factory has rear caster alignment issues, so severe that Mike L at DSC swore he hated the car, and thought it was junk... until he took shims out of the rear UCA's and changed the caster and added his own suspension chip processor to the car (which GM then attempted to emulate, and came out with the suspension reflash for 350 bucks)...

i would agree, the c8 may be better than the "c7 in stock out of alignment factory release form"...

but the first year c8 better than a DSC aligned c7z with their suspension controller?... i would have to disagree with your statement that it will "handle WAAAAY better than a c7"

I think it might not handle better... at all. I think a properly aligned z06 could own the c8 on a roadcourse. I think a c7 grandsport wont be far behind the c8, and the c8 will probably have more power than the grand sport c7.

I would be happy to take my stock c7z with my inferior c7 generation tires and dsc alignment against a first release, factory aligned c8. I think GM is going to have a steep learning curve on ME suspension, i expect suspension geometry tweaks from GM every year for the first 3 years of c8 production. They will call it "trickle down tech from the z06 etc development" aka, "we did not have a clue when we launched, and then a bunch of race teams showed us where we screwed up like they did with the c7s"

(and keep in mind, GM had the c4-c6 to learn how that car was supposed to be aligned, and they still failed, and put the rear caster backwards in angle from where it should have been on the c7...

(and we know it was an intentional failure as GM put their bad rear caster specs in writing)...

and their quality control on this measurement as cars exit the factory is HORRIBLE still in the year 2019, which is 5 years after production began on the c7's and 3 years after GM got called out here on this forum in multiple threads for the rear caster being nothing short of berserk as peoples right and left side can be over a degree off from each other, brand new, off the showroom, or off the truck from the factory)...

(This causes people to wreck and potentially die BTW... and GM still doesn't care to get it on point with their claimed specs, which they have still not admitted those need changed also)

I am very curious to see the changes DSC Mike makes to the c8 suspension geometry... And I would almost guarantee he will be changing it.

as far as wanting to argue against the law of diminishing returns...

well, back here in reality of engineering and physics in our observable known universe, the law of diminishing returns applies to innovation more often than not... which means the percentage gains of increase in grip are going to shrink as time goes by.... IN MY OPINION

For instance... c5 z06 did 1.01 lateral G back in 2001. almost 20 years later, and we are now at 1.17 lateral G with the c7z and grandsports.

that's only a 16-17% increase... and keep in mind, the suspension and steering and frame flex got better as well, and so did tire size and width chosen on the c7 vs the c5.

If it were all tire rubber and construction advancements, then the c5z could pull 1.17 with the same mpss tires in its stock sizes, but it cant.

So the tire advancement in 18 years, have gained a whole whopping 10% tops in handling?
Wow

thats 3 generations of corvettes and 4 generations of tire releases.

And you think this next release is going to gain something more than 3% lateral G over the previous tire?...

And you think that the law of diminishing returns does not apply to tires here on planet earth in this universe's understood way of conducting its laws of physics?

btw, i did not work for goodyear. GM also chose to leave goodyear due to their inability to keep up with Michelin. I dont work for michelin either. I just have real life data where i can get the lateral G's to spike beyond 1.2 lat G on exit ramps while im driving in my c7z with mpss.

 

One more thing about the tire sizes on the C8 , wider tires Doesn’t necessarily mean better handling. There’s something to be said about the car being nimble & having agility. One of the Best handling Hyper cars in the world. ( The Mclaren P1 ) has relatively narrow tires ( 245/35 ZR 19 (F); 315/30 ZR 20 (R) ) So please don’t think the ( base ) C8 isn’t going to have OUTSTANDING Handling because it won’t have super-wide tires. Okay I’m off my soap-box haha ,

 

You made my point! Yep a C8 variant will have wider tires than the anemic looking 305's on the base car. I'll wait for the "Grand Sport" equivalent version!

My Street Rod with it's set back 502 cid engine, headers etc and 53% of it weight on the rear wheels with an adjustable 4 bar link suspension & coilovers needs those 420 section width "sticky" Mickey Thompsons for a reason- sure it's more than tire width! :yesnod