Multi Zone Tension technology, new updated tread profiles and functional tread pattern place the Z8 Roadtec Interact at the top of the sport touring tire class 8% wider final footprint area than its predecessor due to the variation of steel belt tensions and a strategically placed tread pattern which optimizes pressures in the footprint area Innovative tread pattern, a widened and more elliptical footprint and a host of wear-resistant technologies not normally seen in motorcycle tires give the Roadtec Z8 Interact its best-in-segment mileage and optimal wet performance throughout the tire's life New patented tread pattern with strategically placed longitudinal central grooves provide ideal drainage for more than 3/4 of all lean angles in the wet. The remaining tread grooves work to add tread flexibility, extending the footprint for stability in the dry Updated design improves wear regularity which gives riders the benefit of a consistent riding performance across the tires entire life (W)-rated for speeds of 168+ mph Tubeless Blackwall Note: The M Spec is for lighter bikes and the O Spec is for heavier touring bikes. The O Spec has an additional ply in the construction to give it more stability when a bike is fully loaded with luggage and a passenger. Additional Information: Rear 180/55ZR17 C- Spec. 2 plies Rayon for improved stability. Yamaha FJR 1300; BMW R1200R/RT Rear 180/55ZR17 M Spec. Dual Compound. All brands, all models Rear 180/55ZR17 O Spec. Dual Compound, 2 Plies carcass. Rear 190/50ZR17 M Spec. Dual Compound. All brands, all models Rear 190/50ZR17 O Spec. Dual Compound, 2 Plies carcass. Rear 190/55ZR17 C Spec . 2 plies Rayon for improved stability. BMW K1600 GT/GTL