Under what circumstances must tires be replaced?

[LeVanessa]

Tire replacement is necessary under the following circumstances: 1. The tire shows signs of aging; 2. The remaining groove depth of the tire tread reaches or falls below 1.6 millimeters; 3. The tire has bulges; 4. Frequent tire repairs. Tires are circular elastic rubber products assembled on various vehicles or machinery for ground rolling, usually mounted on metal rims. They support the vehicle body, cushion external impacts, ensure contact with the road surface, and maintain the vehicle's driving performance. Tires are used under complex and demanding conditions, enduring various deformations, loads, forces, and high and low temperatures during operation. Therefore, they must possess high load-bearing capacity, traction performance, and cushioning performance, while also requiring high wear resistance, flex resistance, and low rolling resistance and heat generation.

[Rhett]

As someone who often drives the whole family on trips, tire safety is crucial, and I pay special attention to when to replace them. If the tire tread wears down below 1.6mm, it can easily slip in the rain—insert a one-yuan coin, and if you can see the pattern on the back, it's time to replace it. Cracks are signs of aging, especially deep sidewall cracks, which could burst at high speeds in summer. Bulges indicate broken internal cords and must be replaced immediately—they can't be repaired. After six years, tires harden, and even with good tread, the risk increases. Once, a friend didn’t replace old tires and had a blowout on the highway, almost causing a serious accident, reminding me to check regularly and not skimp on this cost. Safety first—timely replacement ensures a stable drive and peace of mind for the family.

[Austin]

As a seasoned car owner who manages vehicle expenses, I understand the economic benefits of timely tire replacement. Worn-out tires not only risk blowouts with costly towing fees but can also damage the chassis, leading to expensive repairs. Old tires increase fuel consumption, costing more in the long run. Replacing tires early during discount seasons actually saves money—premium tires with lower rolling resistance improve fuel efficiency and durability. I inspect tread depth every 50,000 km and replace them when shallow to avoid emergency costs. Opting for premium wear-resistant tires may have higher upfront costs but offers extended lifespan, overall savings, peace of mind, and prevents insurance premium hikes from accidents. Meticulous budgeting maximizes a car's value.

[MacLukas]

Years of experience in car repair have taught me that there are key points to consider when changing tires. A tread depth of less than 1.6mm is the limit—I'll teach you to use a coin test: if the copper shows, it's time to change. Deep cracks on the sidewalls indicate rubber aging, which poses a high risk of splitting. Bulges mean the cords are damaged, and the tire must be scrapped. Even if a tire looks good after five years, it should still be evaluated for replacement. For daily checks, pay attention to even tread wear—uneven wear could signal alignment issues. Simply put, if you keep these points in mind, you'll stay safe on the road.