Tyre designation
Example: 195/65 R 15 91 N
195 Tire width in mm
65 Cross-sectional ratio in % (the height of the cross-section of the tire is 65% of the width)
R Radial design
15 Disc diameter in inches
91 Load capacity indicator (for example: 91 corresponds to 618 kg)
H Designation of the permissible maximum speed (the decoding of the letter designations is given in the Specifications)
2. The most optimal tire size for a specific model is installed by the manufacturer. Remember that installing other tires may change the handling characteristics, affect the braking properties and the functioning of the electronic control systems of the vehicle.
Note: When using tires of a different size, it may be necessary to reprogram the electronic speedometer and some other electronic systems. Do not forget to change the plate with standard air pressure indicators in the tires.
3. When using tires with a directional tread pattern, when installing them, it is necessary to ensure that the direction of the pattern matches the direction of movement of the car. As a rule, the direction of rotation is indicated by a special symbol (for example, with an arrow) on the sidewall of the tire.
4. Some types of tires have protective thickenings around the entire perimeter of the disk, designed to protect alloy wheels from damage. When installing such tires on regular steel wheels, only original protective/decorative caps from Opel can be used.
5. On models equipped with a tire pressure monitoring system (see Chapter "Controls and operating techniques", Section 27) when using winter tires or when installing tires of a different size, at the request of the car owner, sensors of the corresponding system can be additionally installed on these wheels. If the wheels are changed without installing sensors, the system will not show changes in the air pressure in the tires.
6. Some models may be equipped with a special compact type wheel or a tire repair kit instead of a full-size spare wheel. Remember that the compact type wheel is intended only to be able to get to the nearest service station - at the first opportunity, repair the damaged wheel and perform a reverse replacement.
Note: Similar requirements apply to the use of a spare wheel with a summer tire instead of a wheel with a winter tire. When using tires with a directional tread pattern, as soon as possible (if necessary) remount the tire so that the tread pattern direction matches the direction of travel.
7. In the absence of a spare wheel or repair kit, as well as when installing winter tires, puncture-resistant tires (RFT) can be installed on the car. These tires have ROF or SSR markings on the sidewall (depending on the manufacturer) and are installed only on alloy wheels approved by Opel (this also applies to winter tires).
Note: RFT tires cannot be installed together with regular tires, even on different axles of the vehicle.
8. Puncture-resistant tires have self-supporting, reinforced sidewalls, due to which they do not lose their shape when the pressure drops, and allow you to continue driving in case of a puncture or some other damage. In this case, the controllability and running characteristics of the car may change, the braking distance is extended - it is necessary to adjust the driving style and speed to the changed conditions. On a flat tire, you can continue driving at a maximum speed of no more than 80 km/h and for a distance of no more than 80 km.
Attention: The use of a tyre repair kit is not permitted for RFT tyres! Contact an Opel service station as soon as possible!
9. Installation of puncture-resistant tires is permitted only on vehicles equipped with the ESP systemPlus and a tire pressure monitoring system/tire pressure monitoring system.
Please note: Equipping a vehicle with RFT tires does not relieve the driver from the obligation to regularly check the air pressure in them and, if necessary, make the appropriate adjustments!
10. When installing wheels with winter tires on a car, they must fully comply with the design, size and load capacity of the wheels being replaced. It is permissible to install only front or only rear wheels with winter tires, but the greatest effect is achieved by replacing the entire set of tires - when driving on snowy or slippery roads, winter tires have better grip and traction characteristics.
Attention: The maximum permissible speed for winter tires is lower than for summer tires - follow the recommendations of tire manufacturers and the requirements of the Road Traffic Regulations (RTR)!
11. If necessary, anti-skid chains can be installed on the front wheels of the vehicle. The chains must match the size of the tires and be securely and tightly fastened to them. After installing the chains, remove any excess links to avoid damaging the body surfaces when the wheels rotate — the vehicle must be driven at low speeds of up to 50 km/h. If the caps of the steel wheels come into contact with the chain links, the caps must be removed. The authors of this Manual recommend using Opel-approved small-link anti-skid chains whose height, together with the connecting link of the chain, on the running surface and on the inside of the tire does not exceed 10 mm. Anti-skid chains are used when driving on heavily snow-covered road surfaces and are not effective on dry roads, in addition, this may lead to chain breakage.
Note: Local regulations may prohibit the use of chains - please check with your local authority for current regulations.
Attention: For the emergency wheel 115/70 R 16 and for tires of size 215/ 45 R 17, 225/45 I 17, 225/40 R 1B and 235/35 R 19, the installation of snow chains is prohibited! If you need to continue driving with snow chains when the front tire is punctured, then install the compact wheel on the rear axle and the rear wheel on the front axle.
[Text copied from an internet website: opelbook]
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