Tyre Clinic
Bridgestone Tyre Clinic

3. Safety Advice

a. Why are worn tyre dangerous?

  • i. Consequences (tyre performance, braking distance, hydroplaning)
    • 1. REDUCE tyre performance
    • 2. Requires longer BRAKING time and distance
    • 3. Risk HYDRO-PLANING

    When water is unable to be evacuated efficiently, the tyre will float on the water surface, which we term as hydroplaning. Hydroplaning is very risky and will endanger lives as your steering and control over your vehicle will be dramatically compromised due to the contact between your tyre and the ground has been reduced.

  • ii. Tread Wear Indicator and Markers

    Tread Wear Indicators (TWIs)

    Tread wear indicators are bars of rubber located 1.6mm above the base of the groove of the treads. When TWIs are exposed, this means that the tyre needs replacing.

    TWI Position Markers

    The TWI position markers indicate the position of the Tread Wear Indicators via the sidewall of the tyre. Once irregular wear touches this point, it is highly recommended to change the tyre as well.

b. Which position should I put my new tyres?

- We recommend that new tyres should be installed in the rear for safety purposes. Reason being that regardless of whether your vehicle is front/rear drive, newer tyres will provide greater traction than older ones, which is much needed should your vehicle slip and you will need as much control over the vehicle as possible to regain stability.

c. How do I repair a tyre?

  • 1. Patching, Quick Seal
  • - When you’ve encountered a puncture or a flat on the road, it is wise to get the problem remedied as soon as you can. Having a quick seal repair kit in your car can save you from headaches when such problems arise. Follow the instructions given and head to your nearest tyre shop to get the problem fixed, we recommend replacing the tyre with a new one as safety maybe compromised if patching is not done properly. If you do not own a repair kit, you can call local breakdown services for assistance.

  • 2. Common Damages

    - Below are a list of common damages which you may or may not be experiencing and the counter-measures that can be taken:

    • 1) One-sided Shoulder Wear

      Possible causes: i) Misalignment (exp. Toe or camber), ii) Loose/worn suspensions Components, iii) Hard cornering, iv) Improper tyre rotation practices, v) Misapplication, vi) Non-uniform mounting.

      Actions: i) Check vehicle alignment at the workshop, ii) Replace worn and loose suspension components, iii) Reduce your speeds when cornering, iv) Review the tyre rotation practices according to the guidelines, v) Verify proper vehicle fitment, vi) Verify that tyre has been properly mounted.

    • 2) Center Wear

      Possible causes: i) Over-inflation for load carried, ii) Rim width too narrow, iii) Aggressive acceleration, iv) Improper tyre rotation practices, v) Under-inflation for certain tyre types (i.e. Performance tyres).

      Actions: i) Maintain proper inflation pressure regularly, ii) Verify proper rim width is used, iii) Avoid spin-outs and quick starts, iv) Review the tyre rotation practices according to the guidelines, v) Maintain load within vehicle manufacturer recommendations.

    • 3) Both Shoulder Wear

      Possible causes: i) Improper inflation pressure, ii) Hard cornering, iii) Improper tyre rotation practices, iv) Rim width too wide.

      Actions: i) Maintain proper inflation pressure regularly, ii) Slow down when negotiating corners, iii) Review the tyre rotation practices according to the guidelines, iv) Verify proper rim width.

    • 4) Diagonal Wear

      Possible causes: i) Vehicle misalignment, ii) Loose/worn suspension components, iii) Progressing from brake-lock/skid, v) Improper tyre rotation practices

      Actions: i) Check vehicle alignment at the workshop, ii) Replace worn and loose suspension components, iii) Avoid panic stops, iv) Review the tyre rotation practices according to the guidelines.

    • 5) Separation

      Possible causes: i) Prior impact damage, ii) Underinflation/Overdeflection, iii) Improper repair, iv) Excessive load, v) Bead damage, vi) Run flat.

      Actions: i) Avoid impacts such as running over objects, ii) Maintain proper inflation pressure regularly, iii) Verify that proper repair has been ensured, iv) Maintain load within vehicle manufacturer recommendations, v) Verify that proper mounting and dismounting techniques are ensured, vi) Ensure that tyre is inflated at the correct pressure to avoid run flat.

    • 6) Bulging

      Possible causes: i) Road hazard, ii) Impact damage, iii) Mounting damage, iv) Run flat, v) Improper repair.

      Actions: i) Avoid tread surface cuts and contact with curbs, ii) Avoid impacts such as running over objects, iii) Verify that proper mounting and dismounting techniques are ensured, iv) Ensure that tyre is inflated at the correct pressure to avoid run flat, v) Verify that proper repair has been ensured.

    • 7) Curb / Scruff Damage

      Possible causes: i) Impact with curb/pothole/etc., ii) Underinflated/Overloading.

      Actions: i) Avoid running over objects, particularly contact with curbs, ii) Maintain proper inflation pressure regularly.

    • 8) Run Float / Run Underinflated

      Possible causes: i) Puncture, ii) Impact/Road hazard, iii) Excessive load, iv) Improper inflation pressure, v) Rim/Valve/Valve stem extension leakage.

      Actions: i) Find workshop and ensure proper repair is done, ii) Avoid impacts such as running over objects, iii) Ensure that tyre is inflated at the correct pressure to avoid run flat, v) Check rotating assembly and all component parts.

    • 9) Mount / Demount Damage

      Possible causes: i) Improper mounting/demounting procedures, ii) Damaged or corroded rims, iii) Rim width too narrow or bent rim.

      Actions: i) Tyres should only be mounted by trained professionals using the Proper procedures and equipment, ii) replace damaged or corroded rims, iii) Verify that proper rim width is used.

  • 3. Non-repairable Condition

    We highly recommend not repairing tyres of the following conditions:

    • 1) With any tyre of SEPERATION.
    • 2) That shows signs of RUN FLAT or severe UNDER INFLATION.
    • 3) Damages beyond REPAIR LIMITS. (Limitation of repair kit differs slightly across each repair kit brand. It is recommended to check the limitation of the repair kit before using.)
    • 4) Damages to the cords in the BEAD AREA. (E.g. Bead bursting, broken bead wires, etc.)


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