At low speeds, the 577-pound Aero comports itself admirably, with light steering and terrific leverage in turns thanks to the wide bar. At 64.5 inches, the wheelbase is somewhere between the A.C.E. (63.6) and Spirit's (64.8) dimensions, which results in a steady, predictable ride. Ground clearance is better than expected considering the low seat height, but we were less than impressed with the ride quality along sharply irregular roads. Although the dual rear shocks have five-position preload adjustability, there are only 3.5 inches of travel to play with out back, resulting in a somewhat underdamped feel. The 41mm fork offers more neutral handling up front, however, with 4.6 inches of wheel travel for the fat 120/90-17 front tire and a 4mm fork brace to enhance rigidity.