Mine is slow but steady. I have a long (19 miles each way) commute so I don't go all out on any one point, but set myself a pace I can maintain for a couple of hours steady, including 1475 feet of climbing in one direction and 1100 feet in the other (total elevation change is only 375 feet, but there are lots of hills around here). I average 12 or so MPH, including the hill climbs which can get as slow as 4 or 5 MPH depending on how I feel.