Interesting. I had both the ASX and SPT on my old IS300 (215/45 17), and they were completely different tires. The SPT, being a summer performance tire, had much more grip and gave me more confidence when things got fun than the comparatively greasy all-season ASXs. Sharper turn-in and better communication as well. The same held true in the rain - the SPTs were far superior. That said, the ASXs were slightly quieter and rode a bit better, maybe, but they also flat spotted when the car sat for more than a day. But the flip side is that light snow duty is possible with the ASX, if that's your thing. But yes, it's a very good high-performance all-season choice.
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