Tire - Pilot Road 4 GT - Rear - 180/55ZR17 - (73W) Improved handling and stability even with two-up riding thanks to Michelin® 2AT technology, which combines elements of radial and bias construction, Feel more secure, whatever the conditions (excluding snow and ice and other extreme conditions), Lasts 20% longer with grip, (W)-rated for speeds of 168+ mph, Enhanced stability for GT bikes, as equipment for the BMW R 1200RT.