11.20. Check of a condition of tyres

Completely turn each wheel and remove thus cautiously parts of stones and other extraneous subjects by means of a small screw-driver from cuts of a protector of a tyre cover. If the piece of glass or a nail the skeleton in this place can be already damaged "has lodged" in any place of a surface of the tyre. In that case the expert should inspect – even if air does not leave yet. Pay attention to roughnesses, such as cuts, cuts, cracks and absent parts of drawing of a protector. Through the damaged rubber in the tyre the moisture easily gets. However from the outside of it it is impossible to see with open years. For большей safety it is possible to ask to "educate" the expert tyres. However, it concerns as well case of strong deterioration of tyres. Protector drawing in summer tyres on all working surface of the tyre should have depth at least 2 mm. You here cannot be mistaken: residual depth of drawing of a protector can be seen at once in several places. Everywhere there, where on боковине tyres will find out letters «twi» (tread wear indicator, русс. The indicator of deterioration of a protector), there are flutes of drawing of a protector across passing crosspieces of a profile – they have exact height of 1,6 mm. If these cross-section crosspieces already make "unit" concerning a contact surface at once replace such tyres. And not only because it is ordered by the legislator but also because dynamic properties at decrease in depth of drawing of a protector considerably worsen – and mainly – on wet road. It is better to replace summer tyres already at residual depth of 2,5 mm with new pneumatic tyres. Winter tyres already at size about 4,5 mm lose "abilities". Check up, whether all tyres on a circle are worn out in regular intervals. Attentively examine tyre lateral faces: presence of dents unmistakably specifies in damages of a skeleton of a tyre cover.

About what the picture of deterioration of the tyre can "tell"

Unilateral deterioration: consequences of wrong geometry of the bridge.

Deterioration of the middle of a protector: a consequence of frequent driving in a range of high speeds and at air high pressure in tyres.

Deterioration of external edges (forward tyres): a fast manner of movement on turns. Check up a convergence of wheels. Turn tyres on disks in a direction of rotation or replace with tyres of back wheels.

External edges are worn out more strongly, than the middle: too low pressure of air.

Slanting drawing: Specifies in wrong installation of wheels. It arises in that case when tyres are worn out on the one hand more often.

Strong deterioration in the middle of the tyre in comparison with external edges arises owing to frequent driving with the maximum speed. Tyres "are inflated" at the expense of centrifugal force that leads большему to deterioration in the middle, than at edges. Especially distinctly it is shown on back wheels.

Uniform deterioration on all basic surface: most likely, defect in the shock-absorber (tyres "dance" on a road surface).

Износы on both боковинах tyre covers (it is distributed on perimetre): faultless instructions on a disbalance. It is necessary to spend balancing of wheels.

Presence of sites with strong deterioration: the Brake plate. Appears at braking with blocking of wheels only in cars without АБС.

The disbalance of wheels causes vibrations of a steering wheel or дрожательные movements of a forward part of the car. The reason: non-uniform relations of weights on wheels. Unbalanced tyres wear out faster. Hence, at once look for a workshop and spend balancing of wheels of the Mondeo.

Static disbalance And: it is marked already when the wheel at highly lifted car can freely shake: the centre of gravity "has completely moved" downwards. The wheel with a static disbalance jumps up at driving, the shock-absorber wears out faster.

Dynamic disbalance In: it is shown at high speeds. "Excess weight" settles down not in an average plane of a wheel, and is a little displaced to the right or outside or inside. At fast driving the wheel shivers and shivers.

How correctly to store tyres

After reinstallation of summer or winter tyres it is necessary to organise storage of old tyres correctly. For this purpose is better the dry, aired and dark premise is useful. Hold such substances as gasoline, oil, greasing and химикалии far away from tyres – in due course they corrode rubber.

In the beginning mark a direction of rotation and a tyre site with an oil pencil from the automobile first-aid set (software – a lobby right, ПЛ – a lobby left, ЗП – back right, ЗЛ – back left). Remove tyres, clean them by means of water and a good portion посудомоечного means. Dry well cleaned tyres and do not forget to remove extraneous subjects from protector grooves also. Tyres with disks put horizontally, it is better on the wooden pallet. Tyres without disks put simply nearby with each other. From time to time rotate tyres.