Metzeler Roadtec Z8 Interact 160/60ZR18 Rear NEW! 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. The 3-zone-tension Interact ™ Technology gives outstanding mileage and sporty cornering grip.