Many modern cars no longer include a spare tire as manufacturers aim to improve fuel efficiency by reducing vehicle weight. Instead, alternative solutions are provided to handle flat tires.
Automakers are cutting production costs and shedding pounds to maximize miles per gallon. Removing the seldom-used spare tire helps achieve these goals but can leave drivers unprepared during a flat tire incident.
Minor punctures in the tread can often be temporarily fixed using these kits. However, larger punctures or sidewall damage require different solutions.
Successfully sealing a tire is only a temporary repair, meant to get you safely to a repair shop.
Space-saver spare tires, when available, should be driven less than 50 miles and at reduced speeds, as they negatively affect braking and handling.
Having a full-sized spare remains the safest option, especially in remote areas where assistance might be delayed.
There’s no beating having a full-sized tire when you get a flat, especially in a remote area.
Author's summary: Many new cars omit spare tires to improve fuel economy, relying on sealants and run-flats as temporary fixes, but a full-sized spare remains the safest backup.