What is the difference between full-size and compact spare tires?

[OwenFitz]

Full-size refers to a spare tire that has the same size as the regular wheel tires. A compact spare tire is one size smaller than the tires used on the wheels. The differences between them are: Different specifications: A full-size spare tire has exactly the same specifications as the other four tires on the vehicle, while a compact spare tire has a slightly smaller diameter and width compared to the other four tires. Compact spare tires take up less space in the car trunk, whereas full-size tires occupy more space. Different usage scenarios: A full-size spare can replace any temporarily or permanently unusable tire, while a compact spare can only serve as a temporary replacement. Compact spare tires can only be used on non-driving wheels, whereas full-size spare tires can replace any tire.