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I track my 2016 Corvette Z06 about 6-10 days a year. I wore out my carbon ceramic front rotors and switched to Girodiscs/ST31(all four) and these are wearing phenomenally well. I have 6 track days on the ST31 pads and they are still at 75%. I wore through two sets of MPSS Cup 2. The first set lasted three track days and the second set two track days. The rear tires delaminated like others have previously shown. So, now I can either buy a $3,000-$5,000 set of wheels and run 18" with slick take offs. Or I can run a 19" set up and R888R or something else. Any suggestions on a 19" tire besides the R888R?
I can also get a set of $1,500 Centennial Cup wheels for about $1,500 in the stock size and run Hoosier R7. Does any one have experience with the wear on R7 for track days and not racing? Does anyone have first hand experience with R7 - SIZE: P335/25ZR20?
I am now running MPSS (non-run flat) and they are wearing great (over 6 track days and about 50%) but I give up significant grip with a 300 treadwear rating vs a 100 tread wear.
Cup wheels seem to fail with street use, let alone track duty. I'd at least go with flow forged to make sure they don't bend easy. Indeed, I'd not bother with MPSS tires.
I just went through this process over the last six months. I ended up following Bill and Poorsha by going with an 18" wheel set up and Pirelli scrubs. I simply got tired of the Cup2's de-laminating and wearing out so quickly. Like you, I only got 2 track days out of the Cup2's and was tired of spending almost 1000/track day on tires alone.
I had my first session on the 18's and Pirelli's last month and I love them.
Definitely do not go with the Cup wheels. I had both of my rears develop cracks with smooth roads and one track day. I would stay away from them even if they are free.
My 2 cents:
I love CCWs, but they don't have the knurled bead option. Most others are overpriced, which leaves Signature and B.C. Forged wheels, which are same quality, and would both work great!
The factory zl1 1le tire is an option Goodyear Supercar 3r. They supposedly have it in our stock size but I’m not sure if they are actually out yet. The camaro guys aren’t having issues with them and that’s a 19” tire. Then you can run 19” Hoosier, 19” r888r or the zl1 tires.
I track my 2016 Corvette Z06 about 6-10 days a year. I wore out my carbon ceramic front rotors and switched to Girodiscs/ST31(all four) and these are wearing phenomenally well. I have 6 track days on the ST31 pads and they are still at 75%. I wore through two sets of MPSS Cup 2. The first set lasted three track days and the second set two track days. The rear tires delaminated like others have previously shown. So, now I can either buy a $3,000-$5,000 set of wheels and run 18" with slick take offs. Or I can run a 19" set up and R888R or something else. Any suggestions on a 19" tire besides the R888R?
I can also get a set of $1,500 Centennial Cup wheels for about $1,500 in the stock size and run Hoosier R7. Does any one have experience with the wear on R7 for track days and not racing? Does anyone have first hand experience with R7 - SIZE: P335/25ZR20?
I am now running MPSS (non-run flat) and they are wearing great (over 6 track days and about 50%) but I give up significant grip with a 300 treadwear rating vs a 100 tread wear.
Thanks!
A couple things. I have bent or cracked several Z06 and Cup rims on the street but to date I haven't damaged one on track. However, I admit that I typically run 18's on track so I don't have a ton of track time on the stock wheels. The MPSS are actually really capable on track if you get them warm and I have seen over 1.5G on them on my GS. I ran the stock size Hoosier R7s this week on my GS and they seemed to work well. I still think something like the Pirelli slicks on 18's are faster and cheaper but a lot depends on how often you track your car.
I track my 2016 Corvette Z06 about 6-10 days a year. I wore out my carbon ceramic front rotors and switched to Girodiscs/ST31(all four) and these are wearing phenomenally well. I have 6 track days on the ST31 pads and they are still at 75%. I wore through two sets of MPSS Cup 2. The first set lasted three track days and the second set two track days. The rear tires delaminated like others have previously shown. So, now I can either buy a $3,000-$5,000 set of wheels and run 18" with slick take offs. Or I can run a 19" set up and R888R or something else. Any suggestions on a 19" tire besides the R888R?
I can also get a set of $1,500 Centennial Cup wheels for about $1,500 in the stock size and run Hoosier R7. Does any one have experience with the wear on R7 for track days and not racing? Does anyone have first hand experience with R7 - SIZE: P335/25ZR20?
I am now running MPSS (non-run flat) and they are wearing great (over 6 track days and about 50%) but I give up significant grip with a 300 treadwear rating vs a 100 tread wear.
Thanks!
When you get time, im curious about the girodisc rotors... how are they on the street, they are as large as the ccb rotors? squeal? any other thoughts? Thanks
G values spike all the time. I'd recommend not overthinking it : )
Yeah, crossing 1.5 may be a spike but this tire can sustain 1.3-1.4G and that's without any DF on the car. This is a stage 1 GS in a low speed corner on MPSS. I just picked the first lap I found so perhaps there are higher values elsewhere.
I looked on TireRack and did not see Corvette sized SuperCar 3r which I would try if they made them in stock 19/20 sizes. On my 2013 ZL1 the stock Goodyear Eagle F1 G:2 worked great on the street and track. Same with the stock brembo pads, although the calipers did turn a nice shade of bronze.
Originally Posted by Pacembellum
The factory zl1 1le tire is an option Goodyear Supercar 3r. They supposedly have it in our stock size but I’m not sure if they are actually out yet. The camaro guys aren’t having issues with them and that’s a 19” tire. Then you can run 19” Hoosier, 19” r888r or the zl1 tires.
The Girdodisc and ST31 work great on the street and track. The only problem is the brake dust on the street, which is about the same as any Audi, BMW or MB. I will get a light squeak for 1 second as I come to stop when cold and then it usually doesn't happen when warm. In the future, if I have any intention of tracking a car, I will not buy a car with Carbon Ceramics. If I am only going to use the car on the street, then I would probably buy Carbon Ceramics. The CCs really have minimal dust.
Many Porsche people told me they convert to Iron rotors before they track their cars and save the Carbon brakes for when they sell the car. Since I wore my Carbon Ceramics out, I will have the choice of eventually selling my car with Girodisc setup, or re-installing a new set of CCs. I doubt reinstalling CCs would increase the value of the car to offset the parts cost(even from Amazon and self install). So when I sell my Z06 I will probably install some low dust street pads for the Girodiscs.
When you get time, im curious about the girodisc rotors... how are they on the street, they are as large as the ccb rotors? squeal? any other thoughts? Thanks
After reading all the replies, I have determined that I am fine with giving up absolute grip and using MPSS (non ZP) or Continental ExtremeContact (probably my next set) and getting a season (4-8 track days) and driving about 8,000 miles on these tires. I'll just buy a fresh set every year. Buying a $4,500 set of wheels = 3 sets of tires. I could buy reproduction rear rims in 19" size just to run R888R, but I'm not that competitive at the track.
Originally Posted by Poor-sha
A couple things. I have bent or cracked several Z06 and Cup rims on the street but to date I haven't damaged one on track. However, I admit that I typically run 18's on track so I don't have a ton of track time on the stock wheels. The MPSS are actually really capable on track if you get them warm and I have seen over 1.5G on them on my GS. I ran the stock size Hoosier R7s this week on my GS and they seemed to work well. I still think something like the Pirelli slicks on 18's are faster and cheaper but a lot depends on how often you track your car.
After reading all the replies, I have determined that I am fine with giving up absolute grip and using MPSS (non ZP)
I love those tires. I never thought you would go that direction when glancing through this thread, but i agree it is by far most all around practical tire out there. I am curious why you are doing non zp... are you also doing non run flat?
question, how bad does the cup 2 need to delaminate before it needs to be retired? I think I had a section come off on one of my rears but there is no cord showing anywhere so I sent it for 4 sessions yesterday and everything was just fine.
IMHO, once it delaminates you have to stop using it. I also had to drive home 160 miles. This only happened on the rear tires.
Originally Posted by Pacembellum
question, how bad does the cup 2 need to delaminate before it needs to be retired? I think I had a section come off on one of my rears but there is no cord showing anywhere so I sent it for 4 sessions yesterday and everything was just fine.
04-09-2019, 01:37 PM
Hoosier R7 - SIZE: P335/25ZR20 - Road Course
