Let me start by saying I don't claim to have a lot of experience with R-compound tires, I'm just giving a review in comparison to the BFG R1s and various 200TW tires I've tried. Ok, lets get into it.
These tires were pretty fast up to about the 60 run mark, but still not on par with the Hoosier cars. After 60 runs our PAX results were showing us falling down the rankings. Then in July of 2017 we finally installed a set of BC Racing coilovers and went out to try testing and tuning. We did 10 runs on the practice day and then 8 more runs at the championship the next day. It was about 90 degrees on Sunday and I noticed right away we had limited front grip. I had to drive the car like it had an open differential, and once again the PAX results told the story....slower than last time. After our runs I pulled the car into the paddock and removed the wheels....
This is a picture of one of our front tires, and you can see why we were experiencing a lot of understeer. The rear tires still had some life left, maybe one more event since a bit of chord was showing on the edges. But since we are trying to tune a set of coilovers we decided its best to toss them.
So in conclusion we think these tires were great, we got a trophy at the Match Tour and they lasted us a long time. With a proper suspension setup and maybe a better driver these could easily last to 100 autocross runs. Thats really good for a 40TW, since I was only getting 120 runs out of the Dunlop Z2s @ 200TW. Are these tires going to win nationals?-not likely. But they will give you a glimpse into the R-compound realm! So before you go out and drop $1000 on hoosiers, try these first and perfect your driver mod...they can take a beating and still provide lots of fun.
You can purchase these from TireRack;