Since it's a pure performance trackday option, tread is few and far between. Like the rest of the Dunlop Sportmax family, warm-up time is nearly instantaneous. Big D's shoes have a pleasing contour, and the taller 200/60-section rear made our YZF-R1 handle almost as nimbly as an R6. Edge grip is great, but not quite as solid as the Supercorsa SP V2. But what the Q4 misses in grip, it makes up for in rider feedback. Simply put, there isn't a street tire that's more communicative or that allows a rider to flirt as aggressively with the astounding cornering performance of a modern-day superbike. Power slides are easier to control, and the front hoop has just the right amount of flex for deep-trail braking. If you're the kind of rider who values feel over everything, you've found your next sport tire.