When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Did another day on the CR-S and was able to run a near optimal 1:43.7. The tires are wearing a lot better than the C2ZP and show no signs of heat cycling out yet. They were again terrible in the afternoon heat, but the trade off could be worth it for some who is not looking for every last second and wants something a bit more friendly on the limit. Here is a video of the lap:
I've been comparing the Cup 2 ZPs that are an OEM option ROW and came standard on the C7 Z07. The Cup 2R ZP won't fit the stock wheels. I am curious to see what the car would do with the Black Series Cup 2R though. I'm also curious to see what tire life will be like on proper heat cycled C2ZPs. Guess there is only one way to find out!
they are the new Michelin SC2 ZP R as OEM on the C8 Corvette Z07. Early reports are they are lasting longer on the C8 versus the C7 ZP versions and very fast. Let us know if they can be made to fit on your car.
They definitely won't fit since they are 20" front and 21" rear. I would need new wheels to even try. If I'm getting new wheels I would set the car up to run Supercar 3R.
They definitely won't fit since they are 20" front and 21" rear. I would need new wheels to even try. If I'm getting new wheels I would set the car up to run Supercar 3R.
I hated those tires on my C7Z. Dangerously slippery outlap. Not good until third lap. Great after that. Even worse though was the second day I lost 3-4 seconds with them. Not for me.
faster than AR1 /CRS first day but slower by day 2
I finally killed the CR-S and the results are pretty surprising. They definitely change my opinion of the tire for the better. While being undoubtably slower, they last roughly twice as long. On the C2ZP I was able to do 66 laps and on the CR-S I was able to do 138. Granted, the C2ZP were not heat cycled so I am not sure how much that would have extended their life, but I could have run the CR-S a little longer if I had rotated the rears (I only rotated the fronts). So the cost of being 1.3s faster over a 1:4X lap comes out to be about twice as much. You also would need to factor in the time and cost of mounting and balancing twice as often as well. I would also like to note that the stock alignment wore the CR-S down extremely evenly.
I finally killed the CR-S and the results are pretty surprising. They definitely change my opinion of the tire for the better. While being undoubtably slower, they last roughly twice as long. On the C2ZP I was able to do 66 laps and on the CR-S I was able to do 138. Granted, the C2ZP were not heat cycled so I am not sure how much that would have extended their life, but I could have run the CR-S a little longer if I had rotated the rears (I only rotated the fronts). So the cost of being 1.3s faster over a 1:4X lap comes out to be about twice as much. You also would need to factor in the time and cost of mounting and balancing twice as often as well. I would also like to note that the stock alignment wore the CR-S down extremely evenly.
I'm taking one out for third track day next week. So I expect to be in the 150 lap range (@2.2 miles). Running hard and fast. They look to be lasting exactly the same as the AR1.
Advice for anyone trying these is you need to go about 3 psi higher than AR1 because of the softer sidewall. Talking to someone last time out and they said they like higher pressures. Furthermore they said they find the CRS to be - little faster than AR1 🤷♂️. Downside atleast for now is they are $3-400 more than a set of AR1
@dllhg I’m not sure I would run 3psi more. I use a longacre tire pyrometer to help set my pressures and the tires seems to work best in the 30 to 34psi range. Any more than that and the center gets far too hot which is indicative of ballooning. I also run 1 psi less front than rear.
@user33 I only ran the original Cup 2 tires for a few sessions before they started chunking. They were 4 years old at that point so not a very good test but I would imagine a fresh set would last a similar amount of time as the CR-S.
Here are my fronts at time of retirement. They were retired because of the rears, just hard to take a pic of those while still on the car.
08-21-2023, 07:01 PM
