4.1.6. Wear and hodimost of tires

General information
Various requirements are imposed to the tire.
Each of these requirements is put in the tire on a certain share.
Depending on operation and like the car certain requirements can be expressed stronger, and others respectively it is less.
From tires with indexes of speed H, V and Z for "the high-motorized cars" excellent coupling even on the wet, flooded pavings is expected. Instead of it these tires in kilometers can have not such resource big as, for example, at tires with an index of speed of S or T.

Requirements imposed to the tire

Fig. 4.2. The chart of the operational requirements imposed to the tire: A – behavior when braking on a wet paving; B – comfortableness; C – accuracy of management; D – stability at the movement; E – mass of the tire; F – estimated service life; G – resistance to swing; H – hydroplaning



The circle represents a tire resource. It shows how shares of requirements from A to H can be distributed in a design of the tire and in rubber mix.
Improvement of one of characteristics involves deterioration another.

Example
Improvement of behavior when braking on wet covering A negatively influences comfortablenesses of B, resistance to swing of G and estimated service life of F.
Estimated service life of the tire for cars depends not only on rubber mix and a design of the tire. The service conditions caused by the concrete car of feature and style of driving strongly influence a tire hodimost.
On modern cars and with the corresponding motorization are possible both especially careful and economic, and extremely sports styles of driving. The resource of tires from 5000 to 40 000 km and even is possible more.

NOTE
Style of driving is the factor which is most strongly influencing service life of tires.