There are more wheels than doors in the world.

Reasons for More Wheels

• Many vehicles, especially trucks and toy cars, have more wheels than doors. For example, an 18-wheeler truck has 2 doors but 18 wheels. Even typical cars have multiple wheels including spare and steering wheels, often making the wheel count higher than the door count on vehicles alone.

• Wheels are not limited to vehicles; they exist in various objects such as shopping carts, roller skates, office chairs, suitcases, bicycles, conveyor belts, factory machinery, and toys like Hot Wheels and Lego. This vastly increases the number of wheels.

• Many doors have wheels or wheels-like parts (such as door hinges or handles considered as wheels), but not every wheel corresponds to a door.

Arguments for Doors (Less Supported)

• Some argue there are more doors due to the vast number of buildings worldwide, which include multiple doors (rooms, cabinets, refrigerators). However, the number of wheels found in other objects and vehicles tends to outweigh this.

• Cars sometimes have more doors than wheels if you count trunk and gas cap doors, but this is outweighed by the sheer quantity of wheels elsewhere.

Overall, the diverse applications and ubiquity of wheels in many items and industrial machines strongly support that wheels outnumber doors globally.