For Push spreaders, a normal walking speed should adequately dispense materials. Since push spreading is a hands-on activity, the rate at which the wheels turn directly determines the speed of the spinner fan. If the unit is not throwing far enough -or vice versa- increase or decrease your walking speed. For Tow spreaders, going a steady speed of LESS THAN 5 miles per hour is crucial. Speeds in excess of this can strip and damage the gears. To ensure the longevity of the unit, always go slow with the spreader, full or empty.