What Are the Criteria for Changing Tire Models?
1 Answers
Tire replacement criteria are as follows: 1. Technical Standard: Tires should be replaced when the tread grooves are less than 1.6MM. If the tread wear indicators are exposed, it indicates the remaining groove depth is less than 1.6mm. The tread wear indicators are the raised parts within the grooves. Using tires with groove depths below 1.6mm may result in sudden loss of traction and braking power in rainy conditions and complete loss of traction in snowy conditions. 2. Tread Standard: Tires that have been punctured more than four times on the tread; tires with punctures or damage on the sidewall; tires with tread punctures exceeding 4mm in diameter; tires with punctures on the shoulder. The sidewall rubber is thinner, and if punctures are large or the rubber surface shows extensive rough granulation or bulging deformation, immediate replacement is necessary to prevent blowouts. 3. Mileage Standard: Based on road conditions, 30,000-50,000 kilometers. For smooth asphalt roads, 50,000 kilometers; for rough gravel roads, 30,000 kilometers. When exceeding 30,000 kilometers, the tread friction coefficient drops below 50. On wet or snowy slippery roads, the tread's water drainage function diminishes or is lost, with a friction coefficient below 15, increasing the risk of blowouts on gravel roads. Besides the model, tires also display the following common data: Tire cord material: Indicated by Chinese pinyin, such as M for cotton cord, R for rayon cord, N for nylon cord, G for steel cord, ZG for steel radial cord. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under defined conditions. Letters A to Z represent certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h. Rim specification: Indicates the rim size compatible with the tire, facilitating practical use, e.g., "Standard Rim 5.00F".
