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.
Wheel alignment (or 'tracking') refers to the angle and direction at which the tyres are set. Hitting kerbs or driving at speed through a pothole can result in wheel misalignment.Poorly aligned tyres can affect road holding, increase fuel consumption and decrease the life of your tyres.heel alignment (or 'tracking') refers to the angle and direction at which the tyres are set. Hitting kerbs or driving at speed through a pothole can result in wheel misalignment.