170. The following are major defects:1° a single tire or dual tires in the same wheel assembly that are cut, worn or have any other damage exposing the cord, steel belt or tires designed for off-road driving and mounted on a road vehicle other than a truck specially adapted for farming purposes or a farm trailer;
2° a single tire or dual tires in the same wheel assembly having 2 adjacent grooves less than 0.8 mm in depth or 1.6 mm for a tire mounted on the active steering axle of a motor vehicle whose gross vehicle weight rating is 4,500 kg or more;
3° a tire that has a bulge due to a defect in the carcass, is leaking air, is flat, is inflated only to 50% or less of the maximum pressure indicated on the sidewall, or a single tire or dual tires in the same wheel assembly on a road vehicle having foreign material embedded in the tread or sidewall that could cause a puncture;
4° a tire touching a fixed part of the vehicle;
5° a fastening ring for a multipiece wheel that is warped, cracked, poorly adjusted, bent, broken, not securely mounted, welded or not fit for the rim on which it is mounted;
6° a wheel fastener that is missing, cracked, broken or not securely mounted;
7° a wheel that shows signs of repair by welding or that has a crack, a breach or an elongated bolt hole;
8° the oil of the wheel bearing is absent or, where there is a sight glass, there is no oil showing.