E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
- 14. Good advice
   14.2. Changed numbers
   14.3. Purchase of the old car or mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Emergence in deposit oil
   14.12 whether. It is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is rather live, than it is dead …
   14.15. It is not got - good advice
   14.16. Visit to car-care center
   14.17. A gear belt for a drive of the mechanism of a gazoraspredeleniye
   14.18. Wear of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it failed
   14.23. Conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know upon purchase of the air filter
   14.27. Engine overheat
   14.28. That it is necessary to know to the owner of the car with the injector engine
   14.29. Accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. Catalyst
   14.34. Rub in one - or how to save the catalyst
   14.35. Probuksovochka
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. ABS: natural choice
   14.40. Rims
   14.41. We update rims
   14.42. Scheme of marking of a car tire
   14.43. Metal corrosion
   14.44. Automake-up
   14.45. What creaks?
   14.46. Hatch
   14.47. Safety cushion: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Galogenki"
   14.52. About the correct adjustment of headlights
   14.53. Electric motor
   14.54. From change of places "composed" changes nothing?


14.42. Scheme of marking of a car tire


1–M&S (snow and dirt). Marking specifies that the tire has a protector intended for winter conditions;
2–reinforced, marking is entered for the reinforced tires;
3–requirements to loading and pressure (requirements not applicable in Great Britain);
4–defines design type;
5–loading index;
6–symbol of speed;
7–marking such as quality of the tire;
8–the indicator of wear of a protector (marking is located not on all tires);
9–an out-of-date form of designation of the size of the tire, including a symbol of speed (S);
10-brands and code of approbation of ESE type;
11-details of a design of the tire (in Great Britain are not required);
12-name of the producer and trademark;
13-commercial name;
14-designation of the size of the tire. The ESE new form which the index of loading and a symbol of speed follows;
15-a word "tubeless" if it is applicable;
16-manufacturing country;
17-symbol of acceptance by North American department of transport;
18-North American identifier of the tire;
19-designates a design tires (radial).

Now tires mark according to the standards coordinated with the European organization on tires and rims (ETRTO). Conditions and the requirements of today defined by the legislation, make producers responsible for accurate definition of possibilities of the concrete tire. Marking which defines the maximum possibilities of the tire on speed and loading capacity, characteristic for certain service conditions is for this purpose entered.

The numerical code identifies ability of the tire on loading capacity at speed which is defined by a symbol of speed and under conditions which are defined by the producer of the tire. This code is called as a loading index (L.I.).

The symbol of speed defines speed from which the tire can bear the loading corresponding to its index of loading, under conditions which are defined by the producer of tires.

The operational characteristic of the tire includes a loading index (or two indexes of loading in case of unary/dual installation) and a symbol of speed.

Automobile tires

On the automobile tire marking, as a rule, includes one symbol of speed and one numerical index of loading, for example, 185/65 R 14 86 H MXV2.

185-Nominal width of section in mm.

65-Indicator of section of the tire.

R–Radial design.

14-Nominal diameter of a wheel in inches.

86-A loading index (loading capacity makes 530 kg).

H–An index of speed (i.e. speed to 210 km/h, about 130 miles/hours).

MXV2 – protector Drawing.

The reinforced tires

At these tires, as well as at automobile, are available given according to operation characteristics, an index of loading and a symbol of speed. However the characteristic of operation includes higher index of loading and lower symbol of speed in comparison with standard car tires of the equivalent sizes. For example, 185 R 14 Reinforced (reinforced) 94 R: 185 R 14 90 T.

High-quality tires with a symbol of speed of W

W–it is a new symbol of speed which was entered by the Resolution of 30 ESE for the tires maintained on speeds as to, and over 240 km/h up to the maximum speed into 270 km/h.

As well as in a case with a symbol of speed of V, the index нгрузки these tires is established for lower speed; there is the certain decrease in loading capacity expressed as a percentage, on each 10 km/h of increase in speed which in case of application of a symbol W makes 5 %.

Below the full table of symbols of speed with enclosed percentage reduction of a gruzopodjmnost where in that there is a need is provided.

It is necessary to pay attention that tires with a symbol of speed of W can have as well ZR marking. As a result the size can be defined thus 225/50 ZR 16 83W or 225/50 R 16 83W.

V To 240 km/h

100 %
97 %
94 %
91 %
W To 270 km/h
100 %
95 %
90 %
85 %

If the sign ZR is placed by the tire within marking of the size and there are more no other symbols of speed, this tire is intended for the speeds exceeding 240 km/h.

Older tires with the sign VR in marking of the size intended for speeds to and exceeding 210 km/h.

Note: Tires into which dimensional marking the signs VR or ZR enter only, are excluded from the Resolution of 30 ESE.

Tires of vans and easy lorries

There is a big group of vehicles which from the point of view of tires can be divided into three big groups:

1. Easy vans and pickups which represent direct development of the car.

2. Average vans and easy lorries which as those also were designed, but very often use the main components of cars.

3. Big vans and the small lorries using the chassis of a traditional vehicle.

All cars, except for the easiest vehicles from group 2 and 3, use tires "With" for vans or (group 3) 17,5 inch truck tires.

Except for these rather big vehicles, all other vehicles from this category use the standard or reinforced car tires, and the majority of them belongs to 13 and 14 inch.

Other tires for vans and utility trucks

Here various types of tires which in the past marked only the indication of number of layers belong. For example, 185 R 14, 185 R 14 PR6 and 185 R 14 PR8.

Modern tires of this category mark with the indication of operational characteristics, and is frequent and with the indication of a class of layers. (It is expected that the marking concerning a class of layers, will be gradually cleaned).

In those cases, however, when the tire can use on a back axis in dual option, apply two indexes of loading.

For example: 205 R 14 109/107 N

109-A loading index when the tire is used in single option (1030 kg on the tire)

107-A loading index when the tire is used in dual option (975 kg on the tire)