I ran 19:46 with a camo x 2.5 on a pro 8 - combined they provided much better hook in firmer snow. Also with full set of Carl's clutching, belly busters. On a 2.4 or 2.6, the impact would be less. We all love to ride pow - unless you're a pro or have the winter off, those days are fewer than the setup days. Consider track and snow conditions when you actually ride, match them up. Lost 4 mph on the dream-o-meter at full shift on the flat, same clutching. FWIW.