Tire designation example
- 195 - tire width in mm.
- /70 - ratio of height to width (tire cross-sectional height is 70% of the width).
If there is no special indication of the ratio of transverse dimensions (e.g. 155 R13), then we are talking about the normal ratio of height and width, which for radial tires is 82%.
- R - radial design (radial tire).
- 14 is the rim diameter in inches.
- 89 - characteristic of the permissible load.
Attention: If the designation M+S is between the numbers 14 and 89, then we are talking about a tire with a winter tread pattern.
- H - letter designation of the permissible maximum speed, H: up to 210 km / h.
The maximum speed designation letter is at the end of the tire size designation. The speed symbols are valid for both summer and winter tyres.
Letter designation of speed
Attention: If after the designation of the tire there is an inscription reinforced, then this is a reinforced tire, for example for Van and Transporter cars.
Tire manufacturing date
The date of manufacture is indicated on the tire in the manufacturer's code.
Example: DOT CUL2 UM8 4803 TUBELESS
- DOT — Departament of Transportation (Ministry of transportation)
- CU is the manufacturer's abbreviation
- L2 - tire size
- UM8 - bus version
- 4803 - date of manufacture - 48th week of 2003
Note: If instead of a 4-digit number, a 3-digit number followed by a < symbol is indicated, then this indicates that the tire was manufactured in the last decade. The notation 509<, for example, should read: 50th week of 1999.
- TUBELESS - tubeless tire (TUBETYPE - tube tire)
Attention: Since 10/98, new tires must additionally have an ECE test number on the sidewall (European Economic Commission). This number indicates that the tires comply with the ECE standard. Tires manufactured from 10/98 without an ECE number are not approved for use.
An example of a disk wheel designation:
5½J x 15 H2, ET38, LK 4/100
- 5½ is the inner width of the rim in inches.
- J - letter designation of the height and outline of the rim flange (B - low rim shape).
- x - letter designation of a one-piece deep rim.
- 15 is the rim diameter in inches.
- H2 - the rim profile has a hump on the outside and inside (protective collar that prevents the tire from slipping off the rim).
- ET38 - rim nozzle depth: 38 mm. This size in millimeters indicates how far the surface of the rim fastening with bolts is removed from its central plane.
- LK 4/100 - in this example, the rim is fastened with four bolts located around a circle with a diameter of 100 mm.
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