Cutch100

Does anybody have have any data on how many hours of track time they have gotten out of a 200TW tire? I am aware that RS4 generally last the longest (usually at a performance deficit) but I am looking for real numbers on any 200TW tire. In my case I am going to be running a stock drivetrain 1.6 on something in the realm of 205/50R15. I currently have sticker sets of RE-71R, AO52, 595 RS-RR, and RT660 and I am trying to decide what I am going to allocate to what. Thanks!

Xaendeau

Unfortunately I don't have anything to contribute since street miles usually burns 200TW tires out for me. RE-71R will wear quickly with track use, A052s will wear even faster. Both are fast, but not at all cost effective (since I drive for fun). The RS4 is the gold standard for long lasting in this category, as you are aware...very affordable running costs. The RT660, seems to be between an RS4 and an RE-71R in terms of wear. I put RT660s on my 300 HP fiesta and I'm very pleased with them. However, I haven't had as much time to use them since they just came out in 2020 and most activities weren't available...most of the year. I haven't had much experiences with the 595 RS-RR, so I can't tell you anything about them.

I'm interested in data on this too....

Edit: I think the A052s are better track tires than the RE-71s...I think I got that backwards. Regardless, I personally think those two are too soft for economic track use.

emilio700

iTrader: (3)

In enduro, we measure tire life in hours. For an HPDE cars like you describe, I'd expect the RE71R and RT660 to last the longest. My WAG (Wild *** Guess) based on about 150 hours of endurance racing over the last 12 years, 5-7 hrs. RS4 might go twice that long. Bump to 225/45 RS4 and they can last an entire 24hrs race with a stock power 1.6.
595 fastest wearing of that bunch.

duthehustle93

This is extremely dependent on your driving style and car setup. Some tires are more forgiving to these than others but hope I can help a bit...

My setup is a stock power NA8 with 205/50, 15x8, Xidas 1050/600 and a big aero package. I've run all of these compounds in 205; It isn't driven on the street so the alignment and tire pressure have all been set using a pyrometer.

In terms of longest lasting with my car:
RS-4
RSRR
RE71R
RT660
RS-pro (I know you didn't ask for it, but figured I'd toss it in)
A052

The RSRR and RE71R are higher on the list because they get significantly harder towards the end of their life; wear rate plummets pulling drivability and grip with it. RSRR and RE71R were tossed with tread left but RT660, RSPro, A052 I felt comfortable driving down to the cord (lap times dropped with wear, but they were still drivable). Ignoring tread life and looking at usable life, I think the order still holds true but the margin from RSRR-RT660 is pretty small for usable life.

Generally speaking, the list is inversed when talking about which is the fastest. My favorite for my time attack car is the RT660 and we love RS-4's for our endurance car. We run a 225/45 RS4 on a stock 1.8 and will get 24hrs out of a set as Emilio mentioned.

Icedawg

This story just appeared on Grassroots Motorsports (GRM) web pages, after being published in their paper version a month or two ago.
https://grassrootsmotorsports.com/ar...tomation+Email

There is a grading table at the very end of the article.
My own experience with a first gen RX7 endurance racing is in reasonable agreement with the grades they assigned.
We have run Maxxis and Falken Azenis to good effect for up to 24 hours of endurance racing. Though the last 6 hours or so the tires are "greasy", and we have to have paid attention to swapping them around the car to spread the wear, and to flip them inside to outside between races.
We just ran Toyo R1R's and they were great for 8 hours, but one corded after about 2 hours when we tried to run another 8, and the others were bald by the end of that second 8. So they are really about 8 hours, and deserve the C they were awarded for longevity. They stuck really nicely for the first 8 though.

There will be many opinions and experiences, since it depends so much on car and driver. But the GRM story is a good place to start.