How to Find and Read Your Car Tyre Size in Australia
Ever spotted numbers like 205/55 R16 on your tyre and wondered what they actually mean? Those numbers are not random, they tell you the car tyre size with important information about the width, height, construction, and load and speed ratings of your tyre. Understanding car tyre sizes helps you make the right choice when it is time to buy new tyres, fit new wheels, or check that your car is running safely and within the rules. Here’s a simple guide to tyre size explained clearly, helping you find your tyre size and read it properly, so you can make the right choice for your car.
What Do Tyre Size Numbers Mean?
When you take a closer look at your tyre, you will see a series of numbers and letters printed on the sidewall, such as 205/55 R16 91V. At first glance, it might seem confusing, but every part of it tells you something important about your tyre.
- 205 – This number shows the width of the tyre from sidewall to sidewall. In this case, it is 205 millimetres across.
- 55 – This is called the aspect ratio. It tells you how tall the sidewall is compared to the width. Here, the sidewall height is 55 per cent of the tyre’s width.
- R – This letter stands for Radial construction. It means the layers of the tyre run across the tyre radially, which is the most common type of construction today.
- 16 – This figure is the diameter of the wheel, measured in inches, that the tyre is made to fit. Here, it suits a 16-inch rim.
- 91 – This number is the load index. It shows how much weight the tyre can safely carry. A 91 load rating means the tyre can hold up to 615 kilograms.
- 16 – This number is the diameter of the wheel, or rim, in inches. It tells you the size of the wheel that the tyre is made to fit.
- V – This letter is the speed rating. It tells you the maximum speed the tyre can safely travel at. A V rating means it is rated up to 240 kilometres per hour.
If you’re looking to replace your tyres, check our tyre search tool. Using your licence plate, you can find all sort of tyres that suit your vehicle.
Where to Find Your Tyre Size
If you are not sure what size tyres your car needs, there are a few easy ways to find out.
1. Tyre Sidewall
The first place to look is the sidewall of your current tyres. Have a walk around your car and check the side of the tyre. You will find a set of numbers and letters printed there, just like the example we mentioned earlier.
2. Vehicle Manual
You can also find your car’s recommended tyre size inside the owner’s manual. Look in the specifications section where the details about the wheels and tyres are listed.
3. Tyre Placard
Most cars in Australia have a tyre placard fitted from the factory. It is a small sticker you can find on the driver’s door frame, in the glovebox, or sometimes inside the fuel cap. It shows the recommended tyre sizes and the correct pressure for your car.
4. Tyre Supply and Fitting Services
If you are looking for the right tyres, Regos Plus can help. Located in Parkes, we supply and fit a wide range of tyres from trusted brands like Kumho Tyres, Falken, Toyo, and Maxxis. Our team can help you choose the best tyres to suit your car and your driving needs.
Understanding the Tyre Placard
The tyre placard is one of those things many drivers miss, but it is actually really useful. Think of it as your car’s tyre cheat sheet.
It shows you:
- The recommended tyre size or sizes
- The correct cold tyre pressures
- Load ratings
- Speed ratings
Car manufacturers design the placard carefully, making sure it matches the vehicle’s weight, handling, and overall safety standards. Following the tyre placard helps your car perform at its best and keeps you safer on the road.
If you are thinking about changing your tyre size for style or better grip, make sure the new size fits properly within legal rules and does not cause issues with systems like ABS or stability control.
Why Tyre Size Matters
- Safety: Using tyres that are the wrong size can make your car harder to control, especially in emergencies. It can also increase your braking distance and reduce your grip on the road.
- Fuel Economy: If your tyres are too wide or heavier than what your car is designed for, the engine has to work harder, and that can cause your fuel consumption to go up.
- Comfort: Picking the wrong size can make your ride much rougher and noisier than it should be.
- Wear and Tear: Tyres that are not the correct size can wear down unevenly or much faster than normal, which could mean replacing them sooner and spending more money.
How Long Will Tyres Last
Most tyres will last somewhere between 40,000 and 80,000 kilometres, depending on the brand you choose, the type of tyre, and the way you drive. Things like rough surfaces, hard cornering, bad alignment, and not checking tyre pressure can all shorten the life of your tyres.
If you want to get more life out of your tyres, here are a few tips:
- Check your tyre pressures every month to make sure they are sitting where they should be.
- Rotate your tyres roughly every 10,000 kilometres to spread out the wear evenly.
- Watch your tread depth carefully. If it drops below 1.6 millimetres, it is time for new tyres.
- If your steering feels off or your car pulls to one side, have a wheel alignment done as soon as you can.
FAQs
What if the numbers on my tyre are worn or hard to read?
If you cannot clearly see the numbers on your tyre, have a look at the tyre placard inside your car or check your owner's manual. You can also get in touch with us at Regos Plus. We are always happy to give you a hand.
Can I change my tyre size?
You can, but it needs to stay close to the original size so your car stays safe and legal on the road. It is a good idea to speak to a professional before making any changes.
What does the ‘R’ mean on a tyre?
The 'R' stands for Radial construction, which means the tyre’s layers are arranged radially across the tyre. This is the standard for most tyres you will find on the market today.
How often should I inspect my tyres?
Take a quick look at your tyres once a week to spot any obvious damage and check the pressure levels once a month. It is also a good idea to have a professional check your tyres every 10,000 kilometres.
Need Help Choosing the Right Tyres?
Sorting out your correct tyre size does not have to be complicated. If you are feeling unsure or want help understanding how to read tyre size properly, the team at Regos Plus has you covered.
Whether you are replacing your tyres, upgrading your wheels, or thinking about the lifespan tyres, we will steer you in the right direction with advice you can trust.
Make a Booking with Regos Plus