Ahh yes. Much like the disappointment that the 100 UTGQ Toyo 888R's are. I'm going to agree that TW's are less consistent than women's clothing sizes but I think there needs to be some consistency in terms of calculating wear rate... would be nice to see in our respective life times.

 

I went down the wormhole reading one day and I didn't find anything definitive. I think that was because there is nothing definitive but maybe I missed it. I found claims that there is no actual standard objective test for treadwear. The most measured idea that I found suggested that the rating # times 100 is supposed to approximate miles. So 200TW = 20,000 approx. miles. Doesn't hold for our use but I think my daily's car/tire is within the ballpark of that calculation. With warranties being the norm, I think the warranty mileage really matters more and sets a normal customer's expectations. It puts it into terms that make more sense.

I don't think most normal people know that a TW rating exists but they'd ask how long their tire is warrantied. Only people arguing about tires online and writing competition rulebooks will use them. The manufacturers have definitely used the 200TW label arbitrarily ever since that's been the benchmark. Far from perfect but I'm totally fine with it. Do we really want the DOT regulating the TW rating with an objective standard and forcing our tires out of existence?

For OP's sake, I can confirm that A052's have very nice road manners. I think they may have been quieter and softer riding than my RE71s. They do wear VERY quickly though.

 

200TW is more like 10,000 miles if you're lucky. With my camber settings I get ~18-20k from 340.

 

Someone sent me a link once showing that there was an actual standard test method. But given what we see, I would say that is totally ignored.

 

the RT 660 was the hot tire at our 2.5-3 km airport autocross for the 2021 season. 10 events and they're still ready for the dragon trip in 2022...and then they'll be done.
darcy

 

Wow - sorry I went dark there on my own thread.
Some very very good info here - thanks all for sharing.
My car is a street car. I would love to hit a track here or there but I just don't have the time to get away right now with 3 young kids and how busy work is...
So I'm looking for a grippy street use tire that will replace the 71R's which I've really enjoyed. My car is supercharged with 427WHP with 277TQ and the RE's did a great job putting the power down on the 45 tires in the rear... I previously was running Pilot Super Sport tires and I found those too mushy and unable to hold power.

It sounds like the 660's will be my best option from what I'm hearing. I think I'll be able to get another season out of the 71R's too - I peeked at them last night...

 

You'll be happy with the RT660. I would say that it's the proper spiritual successor to the RE-71R with some improvements in heat capacity.

That said, if you're waiting another season, there's a possibility that the RE-71RS makes it to the US.

 

Hit up Track Night in America at DCTC this year! Only have to take part of a day off since they start at 3pm and the sessions are all done by about 7pm. May be a better fit for your schedule. DCTC is small but the events are super fun. They are doing one at BIR again as well but that is more of a drive so you have to take off more of a Friday to hit that one. But still not a bad price (same as the other events) for an hour on track there. Having moved down to KC, I am signed up for a TNIA on the 28th at Heartland in Topeka.

My RT660's just came in so will see how I like them. I autocrossed a car with them on once previously, but it was a car I had not driven and was an old miata with an ecoboost motor with a LOT more tq than a Miata comes with, so was hard to judge the tire itself driving such a different car that would light up the tires in 3rd gear if you looked at it wrong lol. But they should be a good choice.

 

Looks like the RE-71RS are officially on their way

https://grassrootsmotorsports.com/ne...s-coming-soon/

 

Wondering how they will compare to the 71R and the A052

Sizes planned to be available in the US by June 1:

205/50R15 225/50R15 195/50R16 195/55R16 205/45R16 205/50R16 205/55R16 215/45R16 225/50R16 205/45R17 215/45R17 225/45R17 235/45R17 245/40R17 245/45R17 255/40R17 215/40R18 215/45R18 225/40R18 225/45R18 225/50R18 235/40R18 245/40R18 245/45R18 255/35R18 255/40R18 265/35R18 275/35R18 285/30R18 295/30R18 295/35R18 235/35R19 245/35R19 245/40R19 255/35R19 275/35R19 285/35R19 285/35R20