More new vehicles are replacing the spare tire with a compressor and sealant kit, and there are two practical reasons why.
Owners of new vehicles may have noticed an unusual change: many models no longer come with a spare tire in the trunk or cargo area. Instead, automakers are increasingly including a tire repair kit with an air compressor and sealant. There are several practical reasons behind the shift.
One of the biggest is cost. Eliminating the spare tire, wheel and jack allows automakers to reduce manufacturing expenses. Drivers who want a full-size spare can often purchase one separately as an option.
Another important factor is vehicle weight. A spare tire and the equipment needed to change it can add around 60 pounds. For automakers, even a relatively small reduction in weight matters because lighter vehicles can use less fuel and produce lower CO₂ emissions.
This is especially important for electric vehicles and hybrids. Every pound can affect efficiency, while the space traditionally reserved for a spare tire can be used for batteries or other components.
Instead of a spare, drivers are typically given a tire repair kit designed to quickly seal a small puncture. However, these kits have clear limitations. They generally won't work if a tire has been severely cut or otherwise badly damaged. In those situations, the driver will need roadside assistance or another way to get the vehicle to a repair shop.