[swamp2]

Most of the experienced track nuts I spoke to over the weekend suggested that street compound and r-compound tires will behave opposite as far as extreme depth wear vs. traction. It might be an interesting experiment to compare the traction of a good street tire such as a PS2 that was work very quickly vs. one worn slowly. However, such a test is almost for sure a luxury we won't be able to get access to.

lucid: I don't think your advise to simply use them and get every last mm out of them was necessarily bad advice. However, the degree to which the traction was different on the well worn fronts vs. extremely worn rears was huge and unfortunately really hampered my ability to push the car very hard at all. Oh well, it was still fun as track time always is.

As far as the oversteer thing goes, I am fairly used to the understeer/oversteer balance in the car. I'm also used to not being able to get anywhere close to the grip limit of the PS2s during street cornering without pushing really hard (or show boating...). The experience this weekend at the track was really different.

In the end my advise for anyone heading to a track day with well worn street tires will be to seriously consider the tradeoffs of limited traction when you really want it vs. cost of new tires.