Tire Tips

Take care of your tires and they will take care of you.


Improve Tire Life

  1. The condition of your tires is important for driving safety. By following these five golden rules, you can ensure top mileage, safe performance and a longer useful life for your tires.
  2. Check your tire pressures regularly. Uneven inflation between tires affects the driving qualities of your vehicle and makes the tires wear unevenly.
  3. Rotate the positions of your tires between the front and rear axles after every 5,000 to 10,000 kilometers (3,000 to 6,000 miles) as the tires wear differently in different positions. Remember to check tire pressures when changing tires.
  4. Check that you mount your tires according to the rolling direction marking on the side of the tire. If the tires are mounted against their designated rolling direction, their driving qualities will not be optimal in all conditions.
  5. Drive smoothly. Panic braking and side-slips shorten the useful life of tires.
  6. Check your old tires for uneven wear when changing tires. Correctly mounted and carefully driven tires wear evenly. If your tires show uneven wear, get the driving angles of your car measured and have your tires mounted and balanced at a professional repair shop.


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Check Tire Wear

You can easily test the condition of your tires by using tools that are found in your home. The match and coin tests are especially suitable for evaluating the condition of non-studded tires. All of Omni United’s latest products are equipped with Driving Safety Indicators. The driver can use the indicators to check the condition and safety of the tires. The indicator is located on the center surface of the tire, and it indicates the depth of the tire's main groove in millimeters; in other words, it shows how much tread remains.

Testing with a match
You can measure safety by using a regular five-centimeter match, which has a 3–4-millimetre sulfur tip. The tip should disappear from sight when the match is placed into the groove. Test at several points around the tire. If the sulfur remains visible, the tread is not safe for winter driving. We recommend a minimum groove depth of 4 millimeters. The law requires 3 millimeters of tread for winter tires and 1.6 mm for summer tires.

Testing with coins
U.S. coins can be substituted for a tire tread depth gauge as tires wear to the critical final few 2/32"of an inch of their remaining tread depth. Place a penny into several tread grooves across the tire. If part of Lincoln's head is always covered by the tread, you have more than 2/32" of tread depth remaining.

A two-euro coin is also a good benchmark for tire condition. The silver ring at the edge of the coin is less than four millimeters wide. If it rises even slightly above the tread block when the coin is placed in the groove, you should consider replacing your tires.

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Check Tire Pressure 

Instructions to check the inflation pressures.

  • The correct inflation pressure is provided in the owner's manual of your car.
  • Remember that temperature affects pressures: in cold weather, the pressure needs to be higher than in higher temperatures.
  • Never adjust the pressure immediately after driving, because driving heats up the tires.
  • Remember to check the pressure on your spare tire regularly too.


Adequate Storage 

Proper storage can slow down the aging of tires.

The storeroom temperature should be below +25 ºC, it should preferably be dark and below +15 ºC. The properties of rubber may change, affecting the final service life of the tire, if the temperature is above 25 ºC or below 0 ºC. Cool storage does not have any adverse effect on rubber products.

Extremely humid conditions should be avoided. Humidity in the storeroom air must not be so high that condensation occurs on the tires. Tires must not be stored in conditions where they are exposed to rain, splashes, etc.

Tires must be protected from light, particularly from direct sunlight and intense artificial light with a high ultraviolet content.

Oxygen and ozone
Ozone has a very strong deteriorating effect on tires. The storeroom must not contain any ozone-producing equipment, such as fluorescence lamps or mercury vapor lamps, high-voltage electrical equipment, electric motors or any other electrical equipment that may generate sparks or silent electric discharges.

If possible, tires must be stored freely in their natural form, so that they are not under stress, pressure or torsion. Strong deformities developed during long-time storage may break when pressurized.

Solvents, oils, greases, heat
Tires must be particularly protected from any contact with solvents, oils or greases, however short-term. Tires must also be protected from powerful emitters of light and spatter from electric welding.

Tire handling
When handling tires in the warehouse do not ever drop from them from more than 1.5 m height as tires can get damaged from their bead area. The typical consequence could be kinked bead. If you find a tire with kinked bead we do not recommend you mount such a tire to a rim.