Why Suitcases Use Small Wheels Despite Rough-Surface Drawbacks

Suitcases have small wheels because the wheels must fit inside the bottom of the bag.

Bigger wheels would take up more room and leave less space for clothes.

They could also make the suitcase heavier and larger.

Small spinner wheels help the suitcase move in many directions without tilting it.

This is useful in airports, hotels and other places with smooth floors.

However, small wheels can struggle with cracks, bumps and stones.

Bigger wheels handle rough ground more easily because obstacles are smaller compared with the wheel.

Two-wheel suitcases often use larger wheels, but they must be pulled at an angle.

Suitcase makers choose small wheels to balance size, weight and easy movement.