What is the tread depth gauge for tires?

[OElaina]

Tire tread depth standards indicate that a depth greater than 3.5mm is considered good condition, 2.5~3.5mm is normal condition, and less than 2.5mm means replacement is needed. When the tread reaches the limit of 1.6mm, it must be replaced immediately. Methods to check tire tread are as follows: 1. Inspection: Use the built-in tread wear indicator blocks on the tire. When the tread wears down to the level of these blocks, it's time to replace the tire. 2. Gauge: Use a tire tread depth gauge for measurement. Relevant information includes: 1. Age: Generally, regardless of mileage, tires can last about 6-8 years based on usage duration, but this should be judged in combination with actual conditions such as driving habits, road conditions, frequency of use, and whether the tires have suffered impacts, all of which can significantly affect tire lifespan. 2. Note: Besides monitoring tread wear, tire pressure is another crucial indicator. Both overinflation and underinflation can reduce tire lifespan and create safety hazards. For example, overinflated tires driven under high temperatures and speeds increase the risk of blowouts. Tire pressure is closely linked to vehicle performance, directly affecting ride comfort, fuel consumption, and other aspects.