Current fastest R-comp tire that 's streetable
01-05-2016, 06:35 PM
#21
Le Mans Master
Thread Starter
IIRC I only drove the car a couple of times in the rain and I can't remember which tires I had on at the time, but I would baby it driving around in the wet. In my experience the NT-01's were quicker (all of my PB lap times were set on NT-01's). I would replace the full set of tires when the fronts started to go away in the corners so I could probably have run the rears for 1 or 2 more track days. R2s and NT-01s seemed to wear the same. I never wore either tire down to the cords.
My 2003 C5 coupe had a full Z06 suspension, CCW Classic C5Z06 size wheels, and a track alignment (-2.5 deg. Front/-1.5 deg. rear camber).
My 2003 C5 coupe had a full Z06 suspension, CCW Classic C5Z06 size wheels, and a track alignment (-2.5 deg. Front/-1.5 deg. rear camber).
01-18-2016, 09:47 PM
#25
I just completed my personal testing of the PSS on my Z51 C5. They were holding up really well for the first 1/2 tread. I dreamed of getting two seasons out of them justifying the price. The last 5/32" to the point of front cording went very very fast. They stuck well right to the cords and never lost air. 3000 miles and 150 laps to the wearbars with some front cording pretty even wear. Not a daily driver.
I am presently trying out a set of Toyo T1 Sports for $629 full retail from a local dealer. $750 installed and balanced. A savings of $300 and rated at 220utqg. Not a lot of etire stores carry C5 correct sizes for the T1. Only found one place in CA with free shipping for the same money as I paid locally with sales tax. I live in FL and race year round. So far I find them equivalent to the PSS. Time will tell. I've all ready put 1200 miles on them and 15 runs with two people losing 1.5mm is all.
Mostly I high speed autocross on concrete and have a fairly aggressive alignment.
If these don't work out I'll go back to 200utqg performance tires for about the same money as Michelins only lasting one season BUT 15% grippier. Currently only Bridgestone R11's are a direct fit for me. If I play games with sizing to keep the fronts 1/2" smaller diameter for the computer's sanity I can do either Hankook RS3 or BFG 71's figuring one set/year like always before.
You have the wide rims on your Z06 so maybe you have a better selection of tire manufacturers?
The 40-100utqg tires are all pretty expensive $1200-1600 a set. Wouldn't take long to pay for a small tire trailer and hitch to hold the tools, gas can, brakes and jack stands?
I am presently trying out a set of Toyo T1 Sports for $629 full retail from a local dealer. $750 installed and balanced. A savings of $300 and rated at 220utqg. Not a lot of etire stores carry C5 correct sizes for the T1. Only found one place in CA with free shipping for the same money as I paid locally with sales tax. I live in FL and race year round. So far I find them equivalent to the PSS. Time will tell. I've all ready put 1200 miles on them and 15 runs with two people losing 1.5mm is all.
Mostly I high speed autocross on concrete and have a fairly aggressive alignment.
If these don't work out I'll go back to 200utqg performance tires for about the same money as Michelins only lasting one season BUT 15% grippier. Currently only Bridgestone R11's are a direct fit for me. If I play games with sizing to keep the fronts 1/2" smaller diameter for the computer's sanity I can do either Hankook RS3 or BFG 71's figuring one set/year like always before.
You have the wide rims on your Z06 so maybe you have a better selection of tire manufacturers?
The 40-100utqg tires are all pretty expensive $1200-1600 a set. Wouldn't take long to pay for a small tire trailer and hitch to hold the tools, gas can, brakes and jack stands?
01-18-2016, 10:05 PM
#26
I'm still missing (I may have overlooked) what exactly you plan to do with the car. You're going to get recommendations all over the map until you explain EXACTLY how, when, where, and why you drive the car.
Also, what are you're intended sizes? That's a big part with vette size wheel/tire combo's. There's not a lot of options in OEM sizes.
"Street tires" according to the SCCA Autocross rule book are 200 UTQG or higher. These street tires have come a long way in the last 3-4 years.
If you want a true "street tire" that won't disintegrate on track after 1 lap, Michelin PSS or similar are great.
Then there's the current crop of 200 UTQG "cheater" autocross tires like the RE71R's or the BFG RivalS. These won't last as long on the street, but are crazy grippy for "200" tires and are more than up to a few laps on the track.
R888's or NT-01 I wouldn't classify as "street tires". NT-01's could get really dicey driving on the street in the rain after they've worn a bit.
Give us some more details and you'll see the feedback start to zero in...
FWIW, I'm an autocross guy with HPDE habits. I've run RS-3 Hankooks for the last few years. This year I ran the RE71R and they are even better. I don't see how anyone could drive these tires to their limits on the street safely.
Also, what are you're intended sizes? That's a big part with vette size wheel/tire combo's. There's not a lot of options in OEM sizes.
"Street tires" according to the SCCA Autocross rule book are 200 UTQG or higher. These street tires have come a long way in the last 3-4 years.
If you want a true "street tire" that won't disintegrate on track after 1 lap, Michelin PSS or similar are great.
Then there's the current crop of 200 UTQG "cheater" autocross tires like the RE71R's or the BFG RivalS. These won't last as long on the street, but are crazy grippy for "200" tires and are more than up to a few laps on the track.
R888's or NT-01 I wouldn't classify as "street tires". NT-01's could get really dicey driving on the street in the rain after they've worn a bit.
Give us some more details and you'll see the feedback start to zero in...
FWIW, I'm an autocross guy with HPDE habits. I've run RS-3 Hankooks for the last few years. This year I ran the RE71R and they are even better. I don't see how anyone could drive these tires to their limits on the street safely.
01-19-2016, 12:58 AM
#27
Safety Car
I agree from what I can tell. I saw a report that the Kumho V720 will get 17 new sizes in March. That means there is a good chance we can find a pair that will give us the same diameter front and rear to try on the 'Vettes.
Last edited by SBC_and_a_stick; 01-20-2016 at 02:02 PM.
01-19-2016, 06:38 PM
#28
The ones on the Viper are V720 ACR. From what I’ve heard it’s a very different tire than the V720 (non ACR). There have also been a few reports of the V720 (not V720 ACR) delaminating.
01-19-2016, 07:23 PM
#29
Safety Car
The cup 2s delaminate like crazy too. I was hoping for an improvement.
01-20-2016, 10:35 AM
#30
Instructor
I am a bit worried too that they are not same tire without the ACR designation. The ACR 720s are obnoxiously heavy, so perhaps the only difference will be sidewall reinforcement (to deal with the downforce) and not much else in terms of compound and thread pattern.
The cup 2s delaminate like crazy too. I was hoping for an improvement.
The cup 2s delaminate like crazy too. I was hoping for an improvement.
01-20-2016, 10:48 AM
#31
Melting Slicks
Originally Posted by Matt_27
Nope they are completely different, compound and everything.
They look great! I can't believe that car is running those time on a 200tw tire.
Last edited by z06801; 01-20-2016 at 10:50 AM.
01-20-2016, 02:00 PM
#32
Safety Car
"A new extreme performance tire will be available to Kumho dealers in March 2016. Kumho Tire Co. Inc. is expanding the size range of the Ecsta V720, which is original equipment on the ACR model of the fifth generation Dodge Viper.
The Ecsta V720 will be offered in 17 sizes in 15- to 19-inch rim diameters, V, W and Y speed ratings and no mileage warranty. The Ecsta V720 replaces the Ecsta XS."
http://www.moderntiredealer.com/news...y-for-lt-tires
01-20-2016, 07:11 PM
#33
Melting Slicks
Originally Posted by SBC_and_a_stick
This is what I mentioned earlier:
"A new extreme performance tire will be available to Kumho dealers in March 2016. Kumho Tire Co. Inc. is expanding the size range of the Ecsta V720, which is original equipment on the ACR model of the fifth generation Dodge Viper.
The Ecsta V720 will be offered in 17 sizes in 15- to 19-inch rim diameters, V, W and Y speed ratings and no mileage warranty. The Ecsta V720 replaces the Ecsta XS."
http://www.moderntiredealer.com/news...y-for-lt-tires
"A new extreme performance tire will be available to Kumho dealers in March 2016. Kumho Tire Co. Inc. is expanding the size range of the Ecsta V720, which is original equipment on the ACR model of the fifth generation Dodge Viper.
The Ecsta V720 will be offered in 17 sizes in 15- to 19-inch rim diameters, V, W and Y speed ratings and no mileage warranty. The Ecsta V720 replaces the Ecsta XS."
http://www.moderntiredealer.com/news...y-for-lt-tires
01-21-2016, 10:10 AM
#34
Tying the V720 to the V720 ACR looks like some marketing slid of hand. “ It’s the same tire that comes on the Viper” but it’s really not.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
01-21-2016, 10:54 AM
#36
Melting Slicks
Originally Posted by RJonesC5Z
Tying the V720 to the V720 ACR looks like some marketing slid of hand. “ It’s the same tire that comes on the Viper” but it’s really not.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
01-21-2016, 11:23 AM
#37
I would be very surprised if we got new sizes in the V720 ACR, but that's only a guess on my part and tying to read between the lines of the press release. For me if they added sizes to the V720 ACR I would expect it to not meet the tread depth requirement or be banned by the SCCA for Street autocross Classes. So I would not be able to use it. They have already banned it in the CAM classes.
01-21-2016, 01:35 PM
#38
Safety Car
Tying the V720 to the V720 ACR looks like some marketing slid of hand. “ It’s the same tire that comes on the Viper” but it’s really not.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
If you go to the web site linked in the release it does not list Viper sizes.
From reports from one of the top autocrossers in the nation that tested the V720 (non ACR) on a low horsepower car, I expect it to be close to the RE71 or Rival S at a lower cost. We will have to wait on larger sizes to see how it does on high horsepower cars.
02-11-2016, 07:39 PM
#40
I have a pair of the 355/30/19 V720 ACR but haven't got it to fit on the back of the c5z yet. My hope is that it would be a great drive to the track and track day tire, but I haven't been able to find any reviews from anyone who has used them that way...