Why is it rare to see a stroller with four universal wheels? Because it doesn’t work well?

Frequent use of handcart handling will find that the current handcart will have such a design situation, the front is two directional wheels, the back is two universal wheels. Why not use four universal or four directional wheels?

First of all with four directional wheels certainly not, without the assistance of the universal wheel, directional wheels can only move forward in one direction, unless you carry only in a straight line, or else it is better to be honest with the universal wheel? Then why not use four? There are mainly the following considerations:

1, cost-effective: two universal wheel trolley compared to four universal wheel trolley in the manufacturing cost is more affordable. Four universal wheel trolleys require more parts and complex mechanical structures, increasing manufacturing costs and maintenance costs. While two universal wheel trolley’s simple design reduces the number of parts and complexity, so more cost-effective.

2, space utilization: two universal wheel trolley compared to four universal wheel trolley in the use of space more flexible. The extra two wheels of a four gimbal cart require a larger turning radius and space, which may not be suitable for tight environments or crowded corridors. Two gimbaled wheel carts, on the other hand, can be more easily maneuvered in tight spaces and provide better maneuverability.

3, maneuverability and stability: two universal wheel trolleys also have advantages in terms of maneuverability and stability. With only two casters, it is easier to control the direction and turn of the stroller. The extra two wheels on a four gimbal cart can cause instability when turning, especially at high speeds or on uneven ground. Two gimbaled wheel carts are relatively more stable, helping to keep cargo balanced and safely transported.