2012/10/5 · SPerfect Steerable Transfer Carte the truck has four wheels, the total force to move (sustained motion) the truck is 14.1 x 4 = 56.4 lbs. Wheel diameter plays a significant role in the force required to move a load. In the example above, using a 16-in. diameter wheel (with a radius of 8 in.) would halve the required force.