Depends on the tune, suspension characteristics, amount of air in shock and your weight. Pro-pedal is not a full lock-out on any setting (according to the Fox blurb). I did notice a difference when I ran more sag on a recent Alps trip. Only then was there a noticeable improvement in pedalling efficiency with pro-pedal on. (Santa Cruz Nomad with RP23 large can and medium tune for info). Hope that helps.