As the most popular brand of Weifang Yuelong Rubber co., LTD, CONSTANCY has been in the Vietnamese market for many years. After market testing, CONSTANCY is deeply welcomed by the majority of Vietnamese customers. Using environment The intercity passenger bus is from Ho Chi Minh to NhaTrang. The one-way distance is 450 kilometers. The wheel position is driving axle, the speed is 80-100km, and the road conditions are paved roads. Investigation results: The original pattern depth is 22mm, and the remaining average pattern depth is 17.72mm. It has travelled48,364 kilometers, with an estimated mileage of 190,000 kilometers.