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Sizing and Handy Tips

 If you need any help with sizing of wheels and tyres please don’t hesitate to contact us at or 
phone us on 07 5485 3198


We do have lots of helpful information we can email you to assist you with measuring your vehicle or wheels for fitment purposes.

Below is a quick guide on how to read your tyre size, please note numbers may vary depending on your tyre.

Metric Tyre Diagram

Basic Imperial Tyre Size

Maintaining your tyres

Keep air in your tyres

Maintaining the correct air pressure is one of most important things you can do for your tyres health. In just three to four weeks, a good tyre can lose a couple of pounds of air.
It is important to keep check on the air pressure of your tyres regularly to make sure your tyres are not under or over inflated.
Under inflation
Driving on a flat tyre causes increased tread wear on the shoulders (outside edges) of the tyre. And if low enough can shred tyres to bits and damage wheels or worse yet come off. It generates excessive heat, which can reduce or destroy a tyres life cycle. And by running under pressure increases rolling resistance, which will also reduce your vehicles fuel economy.
Over inflation is also unhealthy for tyres. Too much air pressure causes the centre of the tread to carry the majority of the vehicles weight, and also generates excessive heat which tends to wear this section down prematurely. Any kind of uneven wear or excessive heat will shorten the life cycle of your tyres.
What pressure should be in your tyres?
Pressure as stated on the sidewall is the maximum of that tyre at a set load (do not set you tyres to this)
The proper air pressure for your tyres will vary on lots of different factors, like type of vehicle, loads carried, type of road surfaces driven on and even personal preference. The best starting point is to look in the vehicles owner's manual, on the sticker (tyre placard) located in one of the doorjambs or in the glove box, and go from there.
A more precise way to finding the right pressure for your vehicle/vehicles load and tyre combo could be, to start out with the pressure your book recommends and draw some small lines of chalk or paint markers across the tread of your tyre, then drive a few km’s and check the line. Even wear in these lines is what you want to achieve.
 If the line is fading or missing, in the centre it would indicate over-inflation, and some pressure should be dropped.
And if, the line is wearing off at the outer edges first, it would suggest under inflation and the pressure is too low, and your tyres would need more air.
Don’t go stupid here, please use common sense take it slow and don’t go too far below what is on the placard or in your book and do not exceed the maximum pressure as stated on the sidewall.
It is best to set your tyre pressures when your tyres are cold, however this is not always particle so at least try to have the tyres at the same temp every time you check them.
And remember to check your pressure at least once a month, with a high-quality air gauge.

Your Balance and Alignment is important

Having your tyres balanced and your vehicle properly aligned is important not only to the life cycle of your tyres but also, the performance of the vehicle.
Unbalanced tyres cause vibration, which can lead to, premature tyre wear and unnecessary wear to your vehicle's suspension. Tyres should be balanced when they are fitted to wheels for the first time or if they have been removed or remounted.  4x4 tyres that get chunks ripped off or spin on the wheels.
It is recommended that tyres are rebalanced at the first sign of a vibration.
A vehicle is properly aligned when all suspension and steering components, are adjusted so tyre and wheel assemblies are running straight and true. Proper alignment is necessary for even tread wear and correct steering. Uneven tyre wear, or changes in your vehicle's handling, can indicate misalignment.

Rotation plays a big role in preventing uneven ware

A vehicles weight is not always evenly distributed to all four tyres. Things like roundabout’s and corners put extra stress on the same tyre every time you head that same way, to the shop or work. Therefore, regular rotation is necessary to maintain even tread wear and get longest life out of your tyres.
There are a few methods of rotation. For most vehicles on the road, tyres from the rear are moved to the front and crossed to opposite sides of the vehicle.
And the tyres from the front axle are moved to the rear but remain on the same sides. This is known as the "modified X" pattern.
Tyres with "directional" design (only go one way) are rotated  a bit differently. In this situation, all tyres remain on the same side of the vehicle and are rotated straight forward and straight ever for four-wheel-drive vehicles, it is recommended to switch all four tyres, both from side to side and  front to back.
Look inside your owner's manual for the manufacturer's rotation recommendations. If no rotation period is specified, tyres should be rotated every 5,000 to 10,000 km.
Four-wheel-drive vehicles may require rotation more often.

Inspect tyres for damage

Inspecting tyres regularly can help you discover visible signs of damage.
So the next time you check the air pressure of your tyres, have a quick look over for any sharp objects that might of made their way into your tyres. Also look out for any cuts, chunks or scallops. Or anything that looks a bit strange or out of the ordinary.

Are your tyres worn out?

Most tyres have tread wear indicators moulded into the tread.
So If your tread is down to where you can see a solid bar of rubber spanning the width of the tread or it is flush with any of the tread .It could be time for some new ones.
A general guide is any less tread than a match head and its time for some new rubber.
Any cracking, damage, discolour or bulging means you are probably up for some new ones as well.