I've recently had my tires replaced. The old Kumho ones were reasonably fresh when I bought them second hand two years ago, but because of dimensions, I was running comfort tirer in the front and sport tires in the rear. Not ideal on the track with massive understeer as soon as they got warm.
About a month ago I replaced them with Michelin PS2. To lessen understeer even more, I went with 225/45-17 instead of 205/50-17 for the front wheels. That's as wide as you can go on a seven inch wide rim. The rear tires are 255/40-17 as usual.
A few days after getting them on the car I went to a track day and there's a huge difference. I didn't get any lap times, since that's not allowed, but it sure felt faster than before. No tire squeal and I even managed to pass some faster cars.
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