All you need to know about Tyres

Tyre Size

On the sidewall of a tyre along with the manufacturer's name, there's always a set of numbers and letters that relate to the size of the tyre.

A tyre size will typically look like this:


The '195' relates to the width of the tyre in millimetres.

The '65' is the ratio in height of the sidewall expressed as a percentage of the width.

The '15' relates to the size of the rim that the tyre will be fitted to.


Maintaining the correct tyre pressure is vital to getting the most out of your tyres.

Tyre pressure can also influence the fuel economy, handling, and ride comfort of your vehicle.

There is no set standard for tyre pressure and you should consult a tyre specialist about the correct pressure for the tyres on your car.

Under inflation will wear the inner and outer edge of the tyre excessively whereas over inflation will wear the middle of the tyre.

It is recommended that your tyre pressures are checked every 2-4 weeks.

Tyre Age

The age of a tyre can have a considerable effect on the tyre performance. As a tyre ages the rubber starts to harden causing loss of grip particularly in wet weather conditions. Cracks and perishing may also start to become visible in the tyre.

Every tyre is manufactured with a date stamp showing the week and year it was manufactured. This is stamped on the sidewall of the tyre. The first two numbers indicate the week of the year. The last two numbers indicate what year the tyre was manufactured. For example: The below tyre has a stamp of '1117'. This indicates it was manufactured in the 11th week of 2017.

A large selection of quality brands are available at Cooper Tyres Ferry Road, Christchurch. We have carefully chosen the brands that we supply to ensure our customers are receiving a safe and quality product at a reasonable price. With tyres ranging from Economy through to Ultra High Performance (UHP) as well as 4WD, SUV, and Commercial tyres, we have tyres for every application. See below for some of the brands we supply or contact us for further information.

How do I get the most out of my tyres?

The easiest way to get the most out of your tyres is to follow these 3 steps:

1. Tyre Pressures – By keeping the correct tyre pressure your tyres will wear more evenly.

2. Tyre Rotations – We recommend rotating your tyres to different locations on your vehicle every 10,000kms. This will help with more even tyre wear and not having just the front tyres wearing out all the time. Rotations are subject to vehicle configuration. Contact us for more details.

3. Wheel Alignments – Alignments keep your wheels pointing in the correct direction. If the alignment is out your tyres will wear one of the edges faster than the other. We recommend a Wheel Alignment every 15,000-20,000kms.


Not sure if your tyre can be repaired? We can give you the necessary help and advice.