What to Do With a Soft or Flat Tyre

Car

Diagnostic: Tyre Damage that Requires Repair

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

Solution:

The proper repair of a radial tyre (most tyres) includes placing a rubber patch on the inner liner of the tyre and filling the hole with rubber.
Do not attempt to repair tyres with tread punctures larger than 6 mm or any sidewall puncture. Also, do not have tyres repaired that are worn below 1.6 mm tread depth.
Replace your damaged tyre with a spare tyre. First, be sure to check the spare tyre's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle or tyre to be inspected by a tyre professional.

Diagnostic: Under-inflation

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

Solution:

Add air to your tyre 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 in the door.

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I have a flat or soft tyre

Symptom: flat tyre

Diagnostic: Tyre Damage that Requires Repair

Solution:

Symptom: soft tyre

Diagnostic: Under-inflation

Solution: