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Pre-2008: https://www.evolutionm.net/forums/mo...ep-thread.html

Some changes to STU this year - Mini Cooper S is in the class now while the MR cars (Boxsters and Caymans) get 265mm tires. I think 2018 Nationals showed that the CT9A and CZ4A are very capable on the big stage, we'll see what this season brings

 

Jimmy thank you for getting the 2019 STU thread going!

 

Yes, thanks Jimmy!

The MR cars on 265's has me slightly jaded. Not only will the car perform much better, but will also attract top level driver talent to the class. I guess you have to beat the best in order to be the best? They will essentially be on the same size tires as us heavy AWD guys.

Anyone with experience with Vorshlag camber plates on an Evo X? The opening in the strut tower has very little room for the spherical bearing to be moved back, as it sits so far inward due to the camber settings. I'm not sure what affect these will have at that point?

 

Yeah, the MR cars getting 265s might shake things up a bit, I've heard there's at least 1 or 2 STU builds in progress nationally.

 

Yokohoma is changing the A052 tread depth and adding more sizes to comply with the SCCA ruleset.

I haven't follow that tire at all. Does anyone know if it will be a contender against the RE-71R? I see a 265/35R18 listed on TireRack.

 

That other forum has a heated debate about the new tire right now. Some would like to exclude it and some would like it to stay. Some are saying that thread doesn't look street enough, but didn't really elaborate what is "street enough".

From what I can see, if they make enough diameters (5 I think) and enough sizes, while making it happen before the April 30th and thread dept is increased as they are stating to 7.2 mm, it would be hard to argue for it not to be allowed.

As of how fast is compare to Re71s and Rivals S, testing will show this pretty soon. I guess, it all depends where Yokohama wants to be in regard to the current bunch and whether wants to go for the top tire on the autoX side or more on the road racing end of things. Apparently, RE71 does both pretty well from competition point of view, but doesn't last as long as some others. If you want to run it long time, you would look elsewhere, but it lowest time slip is your goal, it might be the one to mount. I would love to see it more on the autoX side of things, but have no data about it yet!

 

I saw some of the other debate. The controversy feels a bit premature when no one really seems to have any info about how the A052 wears or performs.

I agree that if Yokohoma plays the rules, I don't see any reason why the tire shouldn't be allowed to compete. Now if we discover the tire lasts 1/2 as long as RE-71R, I'd be concerned.

I've had good experience with RE71R in both heavy autocross and very mild track duty. My RE71 sets have lasted a long time with pure autocross use, but they wear much faster on track days. I switched to RS-4s for the just-for-fun track work. The wear difference is night and day. If the A052 wears worse than RE71R and costs more, I'd probably just jump to R7s for track days instead.

 

Which forum are you guys referencing by chance?

 

http://www.roadraceautox.com/showthr...13#post2262013

 

Thank you for that! I'll have to check that out when I have a moment.

But I can almost put money on the fact that the A052 will not get up to temp quick enough for it to be faster than the RE71R / Rival 1.5 S for autocross.

 

I'm very curious on how the yoko will perform. A second set of wheels is going to be needed for "wets" according to last year's Nats participation so I don't understand the hatred against the Yoko's. If they are better, I'll get a set. If not, I'll stick with RE71r. Otherwise, I'll maintain the wets on the car when not at an event.

 

One thing I really don't like about them is the price tag! 265s would be as expensive as 275 Rivals, which is $300 more than a set of Bridgestones. At this point, I would rather have RE71s remaining as top dogs...

 

Or we could all just go back to hoosiers where there is no guessing what the other guy is on

 

Love them, but not as much on the stock car. Back in SP and SM, running on those was a thrill! For a softly sprang EVO, street tires are better in my opinion. They are also, $600 more for a set compared to the similarly sized RE71s.

 

Street tires also last longer. The per-run cost is much higher.

Not to mention: It's really nice to arrive-and-drive at every event. Changing tires or hauling the car around on a trailer is a pain.