Tire Tips: Spare & Marks
Spare Tire Tips: Full-Size and Non-Full-Size Spare Tires: The Difference is Significant
Although spare tires aren't often used, they can be a lifesaver in a pinch. However, full-size and non-full-size spare tires have different uses, so don't confuse them.
A full-size spare tire is identical to the vehicle's original tire, with the same size, width, and speed rating. If you experience a flat, swapping it out for a full-size spare tire provides complete peace of mind. Whether driving on the highway or long distances, you can use it just like a normal tire, giving you a sense of security. However, it also has its drawbacks: it's large and heavy, taking up significant trunk space. It's typically found in mid-range and high-end sedans and hardcore SUVs.
A non-full-size spare tire, on the other hand, is smaller than the original tire and often has narrow iron wheels, giving it a "mini" appearance. It's only for emergency use, with a maximum speed of 80 kilometers per hour and limited driving distance. It's best to find a repair shop as soon as possible to replace the original tire. While its performance isn't as good as a full-size spare tire, it's smaller and lighter, taking up less trunk space, making it a great space-saving option for many compact cars. However, a reminder: never use a non-full-size spare tire as a regular tire for extended periods. This not only reduces grip but also potentially affects the wear of other tires, posing a safety hazard.
Side Markings: Red Dot, Yellow Dot, and "Inner" Markings Each Have Their Own Uses
The small markings on the side of the tire aren't just decorative; each one serves an important purpose. Misaligning them during tire installation can be quite troublesome.
The red dot represents the lightest point on the tire's circumference. Because tires aren't always uniformly weighted during production, the red dot allows the technician to align it with the heaviest point on the wheel hub during installation. This results in smoother wheel rotation, less vibration, and significantly improved driving comfort.
The yellow dot represents the tire's center of gravity, where it has the greatest longitudinal rigidity and vibration. Knowing the location of the yellow dot will help you avoid sensitive areas like brake discs and wheel valve stems when installing tires, further reducing vibration and noise during driving and ensuring a smoother ride.
The word "inside" is even simpler; it clearly indicates the inner side of the tire. When installing tires, they must face the side marked "inside" toward the inside of the vehicle. Installing them the wrong way around will not only cause uneven tire wear, but also affect drainage and handling, and in serious cases, could even lead to accidents. Be extremely careful.
Normal tire pressure but appearing flat: Don't panic, this is normal.
Many car owners find that their tires appear slightly flat despite having normal tire pressure, and they worry about a problem. Don't panic; this is normal.
Most cars now use tubeless tires, without inner tubes. The tires themselves bear the weight of the vehicle. When a tire is subjected to force, it elastically deforms, much like a ball deflates when you squeeze it. Therefore, appearing slightly flat is normal. Furthermore, the manufacturer's recommended safe tire pressure isn't always full when the tire is cold. If the vehicle is parked for an extended period, the tire will deform laterally, appearing flatter. As long as the tire pressure is within the normal range, there's no need to worry; it won't affect normal driving.
Tires may be small, but there's a lot to learn. Understanding this information will not only help you choose the right tire, but also extend its lifespan and ensure driving safety. Next time you look at your tires, do they feel both familiar and unfamiliar? Check them out now to give your car a more stable ride!
