Air Pressures

What should I inflate my new tires to?

Air pressure should be set in accordance with the vehicle manufacturer's specification if it's the same as the size originally equipped on your vehicle. The vehicle manufacturer's recommendation can usually be found in the owner's manual, on the door jam, or in the glove compartment. Contact the vehicle dealer for more specific information about your car. Vehicle placard inflation would be the minimum recommended inflation by Kumho Tire.

The importance of maintaining the proper air pressure cannot be overstated. Under-inflation can lead to excessive heat build-up and structural stress, and can cause a tire to fail. Over-inflation can cause uneven tire wear in the center portion of the tread pattern, and can also lead to vehicle handling problems.

Do not check tire pressure after the vehicle has been operated because tires heat up, causing the air pressure to rise. Allow them to cool, then perform your check.

Check your spare tire as well. The proper air pressure for a spare is often different than the tires mounted on your vehicle. The proper air pressure for your spare should also be listed in your owner's manual, door jam, or glove compartment.

Use a quality air gauge when checking the pressure (digital gauges are the most reliable) - or have a professional service technician do the work for you.

Maintaining proper air pressure will also contribute to better fuel efficiency. So check, be safe, and save!

Tyre Safety

  • Driving on any underinflated tire is dangerous and may result in sudden tire destruction caused by excessive heat build-up. For replacement tires, your tire retailer should provide you with the proper inflation pressure. Otherwise, follow the air pressure recommendation found within your vehicle's owner manual or tire placard in your vehicle. If your replacement tire size is different from the original equipment tire size, ask your tire retailer for a revised air pressure recommendation guide in order to adequately support your vehicle's gross vehicle weight rating.

  • Check the cold inflation pressure in all of your tires, including the spare tire, at least once every week and always prior to long distance trips. Failure to maintain the proper air inflation pressure may result in improper vehicle handling, and may cause rapid and irregular tire wear, reduction in tire durability loss of vehicle control, or sudden tire failure that may lead to property damage, serious personal injury or death.

  • Use an accurate tire gauge to check tire air pressures. Always maintain the proper recommended air inflation pressure in all tires. If there is an indication that one of your tires has lost four or more pounds of air pressure, immediately look for signs of penetration through the tire, valve leaks or wheel damage that may account for the air loss. You should also have your tires inspected by a tire retailer immediately.

  • Air pressure should be checked when tires are cold (before they have been driven), ideally in the early morning. Driving, regardless of distance, causes tires to heat up and simultaneously increase air pressure.

  • Never exceed the maximum inflation pressure for the tire.
  • Never bleed air from hot tires as this may result in underinflation.

  • Inspect your tires daily. If you notice any damage to your tires or wheels, replace them with a spare and immediately visit any tire retailer for advice. Driving over potholes, curbs, wood debris, metal, etc., can damage a tire and should be safely avoided. Contact with such hazards requires an immediate and thorough tire inspection by your tire retailer.

  • Always examine your tires for penetrations, bulges, cracks, cuts, and abnormal wear - particularly at the tire edges - which may be caused by, for example, vehicle misalignment or tire underinflation. Failure to properly control a vehicle when one or more tires are underinflated may result in an accident. Use of a damaged tire may result in rapid air loss, including sudden tire failure.

  • An explosion of the tire/rim assembly may occur due to improper mounting. Only specially trained persons should mount tires.

  • Failure to store tires in accordance with the following recommendations may result in damage to your tires, reduction in tire durability, or sudden tire failure.

  • Tires should always be stored in a cool, dry, clean, indoor environment. Tires contain waxes and emollients to protect their outer surfaces from ozone and weather cracking. As the tire rolls and flexes, the waxes and emollients continually migrate to the tire's surface, replenishing this protection throughout the normal and proper use of the tire. However, when tires sit outdoors and are unused for an extended period of time, the tire surface become dry, the tire may be susceptible to ozone and weather cracking, and the casing becomes susceptible to flat spotting.

  • Surfaces on which tires are stored must be free from grease, gasoline, and other substances that could deteriorate the rubber.

  • You should have a qualified technician check all tires when warranty policy period has lapsed, even if damage is not obvious.

  • Do not overload your tires. Driving on any overloaded tire is extremely dangerous and may result in an accident causing property damage, serious personal injury or death.

  • The maximum load rating marked on the sidewall of any tire is based on the maximum speed of operation. Tires that are loaded beyond their maximum allowable loads for a particular application will generate increased and excessive heat that may cause sudden tire failure leading to property damage, serious personal injury or death.

Tyre Rotation

Ideally, tires should be rotated every 3,000 to 5,000 miles. When this is done consistently, the tires are more likely to maintain good handling and traction, and deliver maximum tread life. However, it's important to remember that tire rotation alone cannot guard against rapid or uneven wear if your vehicle has faulty mechanical parts, or improper tire inflation pressure.

Rotation Patterns Explained

Forward Cross - The most commonly used rotation pattern, designed primarily for front wheel drive vehicles - which most cars have.

Rearward Cross - For rear wheel and 4-wheel drive vehicles.

X-Cross - Also for rear wheel and 4-wheel drive vehicles - but can also be used as an alternative to the Forward Cross method for front wheel drive vehicles.

Front-to- Rear & Rear-To-Front - Primary used for performance vehicles equipped with directional tires of the same size.

Side-To-Side - Primary used for vehicles equipped with non-directional tires of different sizes.

What about the spare tire? - If your spare tire is of the same size as the 4 tires in service, you should include that spare in your rotation pattern. Follow the manufacturer's recommended rotation sequence, or introduce the spare into the rotation pattern in the right rear position.

Temporary-use spares cannot be included in your tire rotation.