Tire wear indicators up to a depth of 1.6 mm are located in the places marked on the sidewall of the TWI
Tire pressure check
Tire valve
- 1 and 2 rubber and metal caps
- 3 valve
- 4 valve body
Order of execution
1. UDI, depending on the model and equipment, may have tires and wheels of various sizes. The discs have a pressing depth of 38 mm. The pressing depth is the distance from the middle of the disc to the wheel stop surface on the brake disc or drum.
The wheel bolts for steel and alloy wheels are the same size.
Warning: When installing alloy wheels from other manufacturers, different bolt sizes may be required.
Warning: Technology is constantly evolving. It may be that older models may have different tire pressures. The dimensions specified in the documents for the car are decisive.
2. With a sporty driving style, it is recommended to increase the pressure in the front and rear tires by 0.2 bar. When increasing the pressure, the base value for the various load conditions must be taken into account.
3. Winter tires typically have 0.2 bar higher pressure than summer tires. The recommendations of the winter tire manufacturers must be observed.
4. Since winter tires have a speed limit, a sign indicating the maximum speed must be affixed in the driver's field of vision.
Drive designations
Example 6 J x 15:
6 wheel width in inches
J letter designation of the height and contour of the side flange of the rim of the disk
X single-component deep disc designation
15 disc diameter in inches
- Permissible lateral runout on the side edge of the disk: 1.2 mm;
- Permissible vertical runout on the disc seat: 0.8 mm.
Tire designation
Example: 195/70 R 14 89 H
195 tire width in mm
/70 height to width ratio (tire cross-sectional height is 70% of the width). If there is no separate information about the ratio of width to height (e.g. 175 R 14), which means it is about "normal " relation. It is 82%.
H speed class, H: up to 210 km/h (on new tires is not always given).
R radial design
14 wheel size in inches
89 load capacity parameter
H designation of the permissible maximum speed.
Warning: If the designation M+S is between data 14 and 89, these are tires with winter tread.
The speed letter is behind the tire size. The speed symbols apply to both summer and winter tyres.
Letter symbols for speed
Q 160 H 210
S 180 V 240
T 190 W 270
Tire manufacturing date
The date of manufacture of the tire is on the tire in the manufacturer's code
Example: DOT CUL2 UM8 019 TUBELESS
DOT Department of Transportation (US Department of Transportation)
CU manufacturer's name abbreviation
L2 tire size
UM8 bus version
01 date of manufacture - 01st working week of 1999
TUBELESS tubeless (TUBETYPE - tube tire)
5. Checking the condition of your tires regularly will help you avoid the hassle of stopping on the road due to a flat tire. In addition, such checks provide valuable information about possible problems with the steering and suspension before serious damage appears in them.
6. The tires are equipped with integrated tread wear indicator strips that are exposed when the tread depth drops to 1.6 mm, after which the tires are considered worn. This value represents the minimum allowable tread depth; In most cases, it is recommended to replace tires with a tread depth of 2 mm or less. Tread depth can also be determined using a simple and inexpensive device known as a tread depth gauge.
7. Pay attention to any unusual wear on the treads. Tread defects such as caverns, bulges, flattening and more severe wear on one side indicate misalignment of the front wheels and/or wheel balance. If any of the listed defects are detected, you should contact the tire shop for their correction.
8. Carefully check the tire for cuts, punctures, and stuck nails or buttons. Sometimes, after piercing a tire with a nail, it holds pressure for some time or deflates very slowly.
If there is a suspicion that such "slow puncture" first check the tightness of the inflation valve nipple. Then inspect the tread for the presence of stuck foreign objects in it or previously sealed punctures that have begun to let air through again. If there is a suspicion that there is a puncture, you can verify its presence by wetting the suspected area with soapy water. If there is a leak, the solution will begin to bubble. If the puncture is not too big, the tire can usually be repaired at any tire shop.
9. Carefully inspect the inner sidewalls of the tires for signs of brake fluid leakage. If any, check the brake system immediately.
10. Maintaining the correct tire pressure increases tire life, helps save fuel and improves overall driving comfort. A pressure gauge is required to check the pressure.
Warning: Always keep an accurate pressure gauge in your glove box. Pressure gauges built into the nozzles of air hoses at service stations are often inaccurate.
11. Always check the pressure on cold tires (those. before driving). If you check the pressure on warm or warm tires, this will lead to an overestimation of the pressure gauge due to the thermal expansion of the tires. In this case, the pressure should never be released, as after the tire cools down, it will be below normal.
12. Unscrew the protective cap from the inflation valve protruding from the wheel disk or from the hub cap, then firmly press the pressure gauge nozzle onto the valve. Read the instrument readings and compare them with those recommended in the Specifications. Remember to replace the protective cap to prevent dirt and moisture from entering the nipple mechanism. Check the pressure in all four tires and, if necessary, inflate them to the recommended pressure.
13. Do not forget to maintain the required pressure in the spare wheel.
Tire pressure check
14. Air pressure should only be checked with cold tires.
15. Unscrew the valve cap.
16. The air pressure in the tires is checked once a month, as well as during maintenance (including spare wheel).
17. In addition, the air pressures must be checked before every long trip, as in this case, the temperature load on the tires increases.
18. The required air pressure in the tires is indicated on the sticker located on the inside of the fuel tank cap.
Warning: When using winter tires, the air pressure must be increased by 0.2 bar in relation to the set value.
19. The air pressure of narrow spare tires is indicated on the sidewall of the rim.
Tire valve check
Warning: Valve extensions used must be checked for damage and contamination leading to leaks. Extension cords should be replaced if necessary.
20. Unscrew the rubber protective cap and metal.
21. Apply a small amount of soapy water or saliva to the faucet. If an air bubble forms, tighten insert 3 with protective cap 2.
Warning: Only protective cap 2 should be used to tighten the valve. 1 rubber protective cap, 4 valve.
22. Check the valve again. If bubbles appear and the valve cannot be tightened, it must be replaced (service station work).
23. Be sure to reinstall the protective cap.
Examples of typical tire tread wear
Lateral wear
Insufficient tire pressure causes the tire to overheat while driving due to excessive deflection, resulting in the tread not pressing sufficiently against the road surface. This results in loss of traction and excessive tread wear, not to mention the risk of tire failure due to overheating.
Check and adjust pressure.
Wrong camber (wear on one side)
Repair or replace suspension parts.
Too sharp turns
Reduce your speed!
Central wear
Overpressure
Excessive tire pressure leads to accelerated wear of the central part of the tread, reduced traction, harder driving and an increased risk of fatal damage to the tire.
Check and adjust pressure.
If you have to inflate heavy duty tires to the pressure specified for this purpose in the Specifications, be sure to bleed it after that when going into normal operation.
Uneven wear
The front tires may wear unevenly as a result of misalignment of the wheel alignment. Tire angles can be checked and adjusted for a modest fee at most tire shops.
Incorrect camber or runout
Repair or replace suspension parts.
Suspension defect
Repair or replace suspension parts.
Wheels out of balance
Perform wheel balancing.
Front wheel alignment incorrectly set
Adjust the angles of the front wheels.
Warning: Frayed edges of the tread pattern, which is a sign of wear, is best detected by touch.
Remove the engine oil drain plug on the oil pan and drain the oil completely.
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