19.1. The general data
On cars AUDI A8 establish бескамерные radial tyres and disks of the various sizes.
At disk or tyre replacement necessarily replace the rubber valve with a nipple.
In an operation initial stage new tyres do not provide sufficient coupling with a road covering; the first 100 km it is necessary to move with moderate speed with extra care – to this period of the tyre «прикатываются». Performance of these recommendations promotes increase of service life of tyres.
While in service tyres are put on trial on durability therefore there can be punctures, cuts, ruptures and swellings. It is necessary to delete foreign matters from a protector of tyres regularly.
To avoid damages of tyres and wheel disks, follows slowly and whenever possible at right angle to overcome бордюрные stones and other similar obstacles.
Frequently tyres and disks have the latent damages. Occurrence of unusual vibration or car withdrawal aside can specify in tyre damage. In this case it is necessary to lower immediately speed! Check up tyres on absence of damages (cracks, swellings, etc.). If it is not revealed any external damages, slowly and cautiously follow to the nearest enterprise of car-care centre for careful check of a condition of tyres.
It is necessary to avoid contact of tyres to oils, greasings and fuel.
Instead of the lost dustproof caps it is necessary to put new caps immediately.
Before removal of wheels it is necessary to mark them that at return installation it was possible to keep a former direction of rotation of tyres.
The removed wheels and tyres should be stored pure and dry, it is better in a dark premise. The tyres not mounted on disks should be stored in vertical position.
Before removal of wheels increase pressure in tyres by 0,3–0,5 bar.
At installation of tyres with the directed drawing of a protector (they can be learnt on an arrow on sidewallsе) it is necessary to provide the necessary direction of rotation of the tyre thanks to what optimum "behaviour" of the tyre on road, coupling with road, noiselessness, transfer of traction effort will be reached, at hydroplaning.
Service life of tyres depends in many respects on pressure of air in them.
It is especially important to support recommended pressure in tyres at movement on high speed. It is necessary to check regularly pressure in tyres, at least once a month and before each distant trip. Do not forget to measure pressure and in a spare wheel.
Pressure should be checked on cold tyres. At an elevated pressure in нагретых tyres it is impossible to let the air out from the tyre. Pressure in tyres change according to car loading.
Too low or too the high pressure in tyres reduces term of their service and worsens road performance of the car.
At long movement of the car with high speed of the tyre with excessively low pressure strongly heat up. It can lead to a separation of elements of racetracks of the tyre and even to its rupture.
Too low pressure promotes the raised expense of fuel.
Overcoming of abrupt turns on high speeds, sharp dispersals and braking also increase deterioration of tyres.
The deviation of corners of installation of wheels from standard values causes not only the raised deterioration of tyres, especially unilateral deterioration, but also promotes traffic safety decrease.
Wheels of the new car otbalansi-rovany. While in service the car under the influence of the various reasons balancing of wheels can be broken that it is possible to notice on deviations in normal work of a steering.
The disbalance of wheels conducts to the raised deterioration of details of a steering, tyres and car suspension brackets, therefore follows отбалансировать wheels. Vibration of a steering wheel from a disbalance of wheels is shown in a certain range of speeds and vanishes at decrease or increase of speed. Balancing of wheels is necessary and after installation of the new tyre and after each repair of the tyre.