Trolleys come in different variations including those with one, two, three, or four wheels. The two-wheeled wheelbarrow is particularly versatile as it can easily navigate narrow ramps, pedestrian bridges, and winding paths. With the ability to pivot on the spot, it offers great convenience when it comes to unloading goods. Among the commonly used two-wheeled vehicles are the hand-pull trucks, also known as tiger trucks, which are perfect for transporting small items. For larger loads, shelf trucks and bucket trucks are preferred for their capacity to carry bulk materials. The three-wheeled trolley features one swivel caster, whereas the four-wheeled version has two. These swivel casters can rotate along the vertical axis, automatically adjusting to the direction with the least resistance while the vehicle is in motion.
