Remunerator News

Oct 27 2014

How to read your tyre size for your Novated Lease

Do the letters and numbers on the side of your tyre make sense to you? Are you able to understand what type of tyre you should go for? Your Novated Leases’ original tyre size can be found in your owner’s manual or on the tyre placard located on the driver’s door jamb, glove compartment door, or inside the fuel flap. You can also check your existing tyre’s information on the sidewall.

Unfortunately, many people would find the number sequence rather confusing.

Below are some tips we found to help understand your tyre’s sidewall markings to help you decide which tyres are right for your Novated Lease.

Brand and Pattern

All tyres feature the brand and pattern description on the sidewall. In this instance the brand is Bob Jane and the pattern is Xenon Z7.


Sidewall Markings

Width: Tyre measured in millimetres from the two widest points.

Profile: The aspect ratio of the tyre, which is the height of the sidewall as a percentage of the width.

Wheel size: Diameter of the wheel rim that the tyre is designed to fit, measured in inches



Directional Marking

Directional tyres have been designed specifically to operate best when rotating in one direction. The tyre pattern is usually in the shape of an arrow with grooves running from the centre rib (middle) of the tyre to the outer shoulders. First engineered for racing in wet conditions, directional road tyres have excellent wet weather performance, due to their ability to displace large amounts of water from the road surface, while providing directional stability.

If you have a pair of directional tyres on your vehicle, they will usually have either an arrow or similar symbol indicating the direction they are designed to operate.

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Speed Symbol, Tyre Load & Pressure

Load Index: The load index is a numerical code associated with the maximum load a tyre can carry when inflated to operating pressure. Click here to view the load & speed rating table for full details.

Pressure: Nearly all manufacturers print a maximum inflation pressure on the sidewall the tyre. It is important to note that this is generally not the recommended operating pressure for that tyre. If you are unsure of the correct inflation pressure for your tyres or the pressure description is missing, simply enquire at your local T-Mart or reference the tyre placard on your vehicle.

Speed Category Symbol: This indicates the maximum safe operating speed for the tyre when carrying a load within its load index rating. Click here to view the load & speed rating table.

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Published with permission from Bob Jane T Marts. All rights reserved.