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Symptom: flat tire

Diagnostic: Tire Damage that Requires Repair

  • Most punctures of nail holes or cuts up to 6mm" confined to the tread may be repaired by a tire professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because after a puncture the inside of a tire must be inspected.

Solution:

  • The proper repair of a radial tire (most tires) includes the placing of a rubber patch on the inner liner of the tire and a rubber filling of the hole.
  • Do not attempt to repair tires with tread punctures larger than 6mm" or any sidewall puncture. Also, do not have tires repaired that are worn below 2/32" tread depth.
  • Replace your damaged tire with a spare tire – but first be sure to check the spare tire's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tire professional.

Symptom: soft tires

Diagnostic: Under inflation

  • Reduces tread life through increased tread wear on the outside edges (or shoulders) of the tire
  • Generates excessive heat, which reduces tire durability and can lead to tire failure
  • Reduces fuel economy through increased rolling resistance

Solution:

Add air to your tire until it reaches the proper air pressure (psi: as measured by an air pressure gauge). To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

Symptom: Wear on Both Edges

Diagnostic: Under-inflation

  • Reduces tread life through increased tread wear on the outside edges (or shoulders) of the tire
  • Generates excessive heat, which reduces tire durability and can lead to tire failure
  • Reduces fuel economy through increased rolling resistance

Solution:

Add air to your tire until it reaches the proper air pressure (psi: as measured by an air pressure gauge).
To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

Symptom: Wear in the Centre and Excessive Wear

Diagnostic: Over-inflation

  • The centre of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent this, always check tires when they’re cold, before they’ve been driven or at least three hours after.

Solution:

Take air out of your tire, using a tire-pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

Symptom: Uneven Wear

Diagnostic 1: Poor Alignment

Uneven front or rear tire wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tire dealer for an inspection.
More on Alignment in our Scheduled care tips

Diagnostic 2: Over-inflation issues

  • The centre of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent this, always check tires when they’re cold, before they’ve been driven or at least three hours after.

Solution:

Take air out of your tire, using a tire-pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

Symptom: Scalloped

Diagnostic 1: Poor Alignment

Uneven front or rear tire wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tire dealer for an inspection.

Symptom: Sawtooth Edges and Feathered Edges

Diagnostic: Misalignment

If a vehicle is misaligned, the edges of the tread have a sawtooth or feathered appearance. This is caused by erratic scrubbing against the road.

Solution:

You car most likely needs a toe-in or toe-out alignment correction. Please see your tire professional for inspection.

Symptoms: Dips and Cups

Diagnostic: Worn Parts

  • Cupping (also called dipping or scalloping) is most common on front tires.
  • Rear tires can cup, however, as well.

Solution:

Worn parts may be a sign that wheels are out of balance or that suspension or steering system parts need service or replacement. Please see your tire professional for inspection.

Symptom: Damage

Diagnostic: Tire Damage that Requires Repair

  • Most punctures from nail holes or cuts up to ¼" confined to the tread may be repaired by a tire professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because afterwards the inside of the tire must be checked for punctures.

Solution:

  • The proper repair of a radial tire (most tires) includes the placing of a rubber patch on the inner liner of the tire and a rubber filling in the hole.
  • Do not attempt to repair tires with tread punctures larger than 1/4" or any sidewall puncture. Also, do not have tires repaired that are worn below 2/32" tread depth.
  • Replace your damaged tire with a spare tire – but be sure to first check the spare tire's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tire professional.

Symptom: Bar Across Tread

Diagnostic: Worn-Out tire

  • All tires have tread-wear indicator bars at 2/32" of the remaining tread.
  • When the tread is worn down to 2/32" or when you can see the tread-wear indicator bars on any section of the tire, the tire is worn out and should be replaced.

Solution:

Take your vehicle to a tire professional for an inspection and have a professional measure the remaining tread with a tread-depth gauge.

Symptom: indention

Diagnostic: This is not a problem. It is the normal radial sidewall.

  • Indentations are quite natural on radial tires (most tires) and will not affect performance.
  • Your tires feature one or more layers of fabric cord within the sidewall construction that run parallel to each other. (Steel cords are used within the tread.) Where the cords overlap, there is often slight indentation.

Symptom: bulge or bubble

Diagnostic: Tire Damage that Requires Repair

  • Most punctures, nail holes or cuts up to ¼" confined to the tread, may be repaired by a tire professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is unreliable and dangerous because after a puncture, the inside of a tire must be inspected.

Solution:

  • The proper repair of a radial tire (most tires) includes the placing of a rubber patch on the inner liner of the tire and a rubber filling in the hole.
  • Do not attempt to repair tires with tread punctures larger than 1/4" or any sidewall puncture. Also, do not have tires repaired that are worn below 2/32" tread depth.
  • Replace your damaged tire with a spare tire – but be sure to first check the spare tire's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tire professional.

Symptoms: Vibration or shimmy

Diagnostic: Tires Out of Balance OR Steering & Suspension System Malfunction

  • Tires that are out of balance can cause vibrations that lead to driver fatigue, premature or uneven tire wear and unnecessary wear and tear on your vehicle's suspension.

Solution and advices:

  • The solution could be as simple as rebalancing your tires
  • You might also need to fix your steering and suspension system.
  • Visit your tire professional at the very first sign of vibration or "shimmy."
  • If rebalancing doesn't eliminate the vibration, have the alignment and/or suspension system components checked.
  • Tires should be balanced when they are mounted on wheels for the first time or when they are remounted after being repaired.

Symptoms: Pulling to One side or Poor steering

Diagnostic 1: Poor Alignment

Uneven front or rear tire wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tire dealer for an inspection.

Symptoms: Poor handling

Diagnostic: Tire Damage that Requires Repair

  • Most punctures from nail holes or cuts up to ¼" confined to the tread may be repaired by a tire professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because after a puncture the inside of a tire must be inspected.

Solution:

  • The proper repair of a radial tire (most tires) includes the placing of a rubber patch on the inner liner of the tire and a rubber filling in the hole.
  • Do not attempt to repair tires with tread punctures larger than 1/4" or any sidewall puncture. Also, do not have tires repaired that are worn below 2/32" tread depth.
  • Replace your damaged tire with a spare tire – but be sure to first check the spare tire's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tire professional.

Can my tire be repaired and how?

If your tire becomes damaged, it may be repaired if:

  • The tire has not been driven on when flat
  • The damage is only on the tread section of your tire (sidewall damage ruins a tire immediately)
  • The puncture is no greater than 6mm"

How is a tire properly repaired?

  • The tire is demounted and inspected internally as well as externally. It is then patched from the inside and the puncture hole is filled.
  • Do not have your tire plugged. A plug is simply inserted into the punctured area, making it unreliable.
    Tires should be repaired by a tire professional.