I used the Azenis 215 on my Miata back in '05. At the time, they were considered THE UNQUALIFIED BEST non-R competition tire to have for autocross. They were the stickiest non-R tire I've ever used. They were discontinued though.
Pros:
-Sticky as hell
-Legal for competition where your couldn't use R tires
-Really stiff sidewall, little roll over
-Inexpensive (I believe because they had little tread depth, basically they were manufactured at a "shaved" depth)
Cons:
-Only lasted 10k miles
-Became REALLY noisy around 7k. I mean "sounds like we're driving on basketballs" noisy.
-Got pretty slick at less than 55 degrees or so.
When they wore out, I got something slightly less agressive. They were fun while they lasted, but newer revisions were almost double the price and the reviews weren't quite as high.
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