Can a Spare Tire Be Used Long-Term?

[LeJordan]

Spare tires are not designed for long-term use and should not replace regular tires for extended periods. Due to their infrequent use, spare tires have less contact with the road surface, resulting in reduced friction. When a spare tire is installed, the varying friction coefficients, ground adhesion levels, and tire pressures among the four tires can negatively impact the vehicle's braking system, steering system, and suspension over time, posing significant safety risks. Additionally, prolonged use may cause uneven wear on the other tires in the same direction. If a tire is punctured or blows out, the spare can be used temporarily with no mileage restrictions, but it is crucial to drive at reduced speeds. This is because the torque on the wheel bolts may not meet specifications when a full-size spare is installed, creating potential hazards at high speeds.