Pirelli Diablo Sport/Custom Radial Rear Tire - 240/40-18 1682600 The first W-rated custom tire meets the requests of sport bike builders and riders A perfect match for Trac Dynamics Big Wheel 240 kits; see Sportbike section State-of-the-art ride and performance creates the new benchmark for the custom market Patented steel-belted technology provides zero tire growth W-rated for speeds up to 168mph