The knowledge of tyres is presented as follows: i. Classification of tyres: it can be divided into meridian tyres and tilt tyres. Ii. Categorization of trajectories: can be divided into stripes, horizontal trajectories, mixed trajectories, cross-country trajectories. Category: tyres by vehicle type can be divided into approximately eight types. These are: pc — sedan tyres; lt — light vehicle tyres; tb — cargo vehicles and buses; ag — agricultural vehicle tyres; otr — engineering vehicle tyres; id — industrial vehicle tyres; ac — aircraft tyres; mc — motorcycle tyres. Size classification: 1. Full-size spares: the full-sized spares are of exactly the same size as the four other tyres in the original vehicle and can be replaced by any of the tyres that are temporarily or no longer usable. 2. Non-full-size spares: the diameter and width of the tyres are small compared to the other four tyres and therefore can only be used as temporary replacements and only for non-drive wheels, and at a maximum speed of 80 km/h per hour. Pressure classification: zero-pressure tyres are also referred to as safe tyres (run-flat-tirre), commonly known as “explosive tyres”, which industry translates into “negative preservation tyres”. Compared to normal tyres, zero-pressure tyres do not leak very slowly after they are punctuated, are able to maintain the contours of the vehicle and are able to hold their beads on the wheel, thus ensuring that the vehicle can move to the maintenance station for long periods or temporarily. As a result, vehicles carrying such tyres are no longer required to carry spare tyres, thus hiding the spare tires in another way, invisiblely, in four tyres. Let's go
