Maintenance work
Rotate each wheel completely once.
Remove foreign bodies, such as small stones, with a narrow screwdriver from the profile plates, being careful not to damage the tires.
Tire profile, according to the law, must be at least 1.6 mm deep (before 1 mm) across the entire width of the tread.
To check the wear, elevations are used, passing at equal distances across the working surface in the grooves of the tire profile. They are marked on the sides of the tires with letters «TWI» (Tread Wear Indicator = tire wear indicator).
If these bulges are at the same height as the tread pattern, then you need to urgently change the tires. The behavior of the machine on wet roads becomes problematic already at 3 mm of residual profile depth, especially with wide profile tyres.
Some conclusions can be drawn from the profile wear pattern, which you will learn about in the next section.
Tire pressure should be checked regularly. This is best done with your own pressure gauge. Try to do this without letting the air out. while the pressure is reduced. In this case, you need to quickly pump it up.
Tire pressure affects the size of the bearing surface of the tires, it affects the driving performance of the car and the life of the tires.
1 - with the correct tire pressure, the tread across the entire width is adjacent to the roadway.
2 - due to too high air pressure in the tires, only the middle of the tread is in contact with the roadway.
3 - if the pressure is too low, the tire rests mainly on its shoulders.
Tip: hard braking kills tires! Squealing tires and the associated smoke from burnt rubber are familiar. But what is less known is that the rubber on the working surface completely burns out. There is no rubber in these areas and the tires are no longer as round. Depending on the abrasion - and it depends on the duration of full braking - such a tire should be examined by a specialist in this field. Especially in those cases when, after such braking, you feel a restless course in the steering.
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