Must tires with small cracks after four years be replaced?

[LailaRose]

It depends on the condition of the tire cracks. Here are the details: 3-5 years: Generally, the lifespan of tires is 3-5 years. After 3-4 years of use, due to rubber aging, it's common to see many cracks. If the cracks are few and only appear on the tread, this is normal aging cracking or wear, and replacement is not immediately necessary. However, regular inspections are essential since the tires are nearing the end of their lifespan. Excessive area: If the cracks cover a large area, are too long or deep, and are close to damaging the tire body—especially if they appear on the sidewall or in the drainage grooves—the tires must be replaced as soon as possible. The sidewall is the most vulnerable part of the tire, and continuing to drive with such damage could lead to a blowout or other serious issues.