Hypercapnia is an unusually high concentration of carbon dioxide in the blood which may be accompanied by hypoxemia, in which the oxygen level in the blood is low. This condition occurs as a result of poor gas exchange at the lungs which makes it difficult for people to eliminate carbon dioxide from their bodies.
Quick Answer. A tire treadwear rating refers to the amount of time the treads on a tire should last in specific conditions. Tire manufacturers indicate treadwear rating on their tires using a set of numbers between 100 and 700. These numbers indicate how long tire treads will remain safe and perform at their highest capacity.
Tread depth must not fall below the legal minimum. The tread is that part of the tyre in contact with the road in normal conditions. The minimum depth of tread depends on the class of vehicle.yres must be correctly inflated to the vehicle manufacturer's and the tyre manufacturer's recommended pressure. If you drive with damaged or worn tyres you risk being fined. You risk invalidating your car insurance policy and endangering lives too.