Metzeler Roadtec Z8 Interact Rear Tire (170/60ZR17 M Spec) The new Metzeler Roadtec Z8 Interact allows the rider to keep everything under control. The tire follows the riders instincts with a sublime blend of precise and effortless handing. The new Roadtec Z8 Interact is designed to make riding easier, regardless of the motorcycle - for a long and safe experience. The new tire contour together with the patented profile design improves handling and reduces steering effort significantly - for maximum confidence in all riding conditions. New design: The profile shape, inspired by the Greek letter "Pi", maximizes the flexibility of the profile, thus ensuring an optimum tire footprint under in all conditions.