Laps allow the rider to keep track of specific segments of a ride through use of the lap button . At ride start, the first lap also starts recording lap totals and averages. Each time the rider presses the lap button, the lap re-starts and begins recording averages and totals from the beginning of the current lap. Laps are very useful for riding a workout, as well as keeping track of more specific parts of rides, such as pacing up a climb.