If you already have alternative tyre sizes, you can’t use these for the calculator, as you will quickly stray out of the safe limits for size difference, among other issues. This tyre size converter is designed for comparing new tyre sizes against the original size - the option recommended by the car’s manufacturer, as stated in its manual.īecause of this, it is vital that you know the original tyre size for your vehicle. However, if you do wish to use a different rim size, our specialists are always available to help. Your safest solution is to choose equivalent options with the same rim diameter. Cars just aren’t designed to accommodate such great changes, which is why rules such as the 1.5% or -2% are regularly used. Similarly, you couldn’t go up from a 185/80 R13 to a 225/40 R18 tyre due to a look of space in the wheel arch.
You can’t replace a standard 225/40 R18 tyre, for instance, with a 185/80 R13 tyre, as the smaller model would require 13 inch wheels that can’t fit the braking discs from the larger 18 inch wheels. Likewise, you need to be careful when changing the diameter of the tyre. As such, always keep the physical needs and parameters of your vehicle in mind. Our tyre calculator does not, for instance, take into account your specific car or model. Our tyre diameter calculator is a great tool for finding a new tyre size, but you should keep in mind some physical limitations. An alternative sizes can offer various improvements, such as a shorter braking distance, as well as drawbacks, so it is important to understand what it is you want from your car tyres.įind the correct tyre sizes for your vehicle. For most drivers, this is done to achieve or improve certain driving parameters on their vehicle. When it comes to these results, it is recommended that you only use options within 1.5% and -2%. Our tool gives this in percentages: a positive number is larger/wider, while a minus number represents a negative change. When using a tyre size comparison tool, it’s important to know the difference in the outer diameter.
TIRE COMPARE TOOL PLUS
They are typically larger - upgrading in this way is referred to as plus sizing. Alternatives, on the other hand, have a different size.
TIRE COMPARE TOOL DRIVERS
When it comes to choosing a new size, many drivers choose to stay within the same size and diameter - these tyres are known as equivalents. The tyre size calculator does not include information about car make and model. Please keep in mind your car's capabilities.
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