On the highway, the Convertible, at 38.8 mpg, topped the others in average fuel mileage. We were surprised that the four-cylinder Tour Classic, at 37.5 mpg, beat the Silverado (36.0) and Road King (34.4). At this rate of consumption, the Convertible and Silverado would have the best range, at 190 miles. But even the worst of the bunch, the Road King, would still top 170 miles. In the city however, the Silverado and Road King were slightly better than the Tour Classic, but the Convertible was the only bike to average more than 30 mpg in traffic.