If the Sportec M5s were overstressed on a hot racetrack under a mega-powerful literbike, they were at home on Triumph’s Speed Triple during the afternoon street ride, delivering easy, neutral steering and enough traction to wheelie out of tight corners. But the new Roadtec Z8s were the biggest surprise. A durable, high-tension center and traction-enhancing low-tension shoulders conspire here with a high-silica “nano-particle” compound engineered to perform equally well on hot days or in cold, wet conditions. We noted little difference in street performance compared to the M5s, with quick turning, exceptional rough-road stability and plenty of rear grip—at least on a mid-powered Yamaha FZ8. If the Z8s indeed wear longer than the M5s, these could be the sport tire value of the year.