The quality is average. The transportation distance can only be within 10 km, the speed of heavy vehicles is not allowed to exceed 25Km/h, and the daily work is not allowed to exceed 12 hours. Can not be overloaded, if the above conditions can be met, the quality can only meet the general evaluation. In fact, many manufacturers in the market have introduced three packs of mining series tires. If your working conditions are really bad, you can use these tires. If there is a problem, someone will handle it and a professional agent will give you guidance. What do you say! I hope I can help you.