What to Do With a Soft or Flat Tyre

Diagnostic: Tyre Damage that Requires Repair

Most punctures of nail holes or cuts up to 6mm 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 because after a puncture the inside of a tyre must be inspected.

Solution:

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

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I have a flat tyre or a soft tyre

Symptom: flat tyre

Diagnostic: Tyre Damage that Requires Repair

Solution:

Symptom: soft tyres

Diagnostic: Under inflation

Solution:

Can my tyre be repaired and how?

The tread looks frail