11/21/2023 0 Comments Tire size comparison toolIt should be noted that, although T, H and V are all above 70 mph - the national driving limit in the UK - you still require an index that matches the car manufacturer’s specifications. The tyre speed index is expressed with letters, each having a specific limit, such as: Speed Index - Known as SI for short, the speed index determines the maximum speed allowed for a given tyre. The letter at the start of the third value refers to the type of tyre construction. The third value (16) is the rim diameter in inches. The second value (55) is the tyre profile in percentage. ![]() The first value (in this example, 205) is the tyre width in millimeters. Simply put, it is made up of a series of numbers. Tyre Size - The tyre size is easy to read, once you know how. Not sure what some of the numbers on your tyre mean, or how to identify the various indexes? We’ve prepared a small dictionary of these terms for your benefit. This is important when choosing new car tyres in your chosen size and ensuring they are within the accepted index limits. However, this will just show you all the theoretically possible sizes.Īside from the acceptable tyre diameter difference, you should also consider the various indexes and factors that represent a tyre’s suitability. Our tyre size converter helps identify alternative sizes by using restricting diameter sizes to the specified 1.5 or -2% rules mentioned earlier. If you fit tyres with a smaller diameter, the speedometer will instead show a higher than realistic speed. If you fit tyres with a larger diameter, the speedometer will show a figure lower than your actual speed. This change depends on the change in tyre size. If you fit a tyre equivalent with a bigger diameter, this can cause the speedometer to misrepresent your actual velocity. Better driving in winter conditions (especially if you’re using a winter tyre).Increased driving comfort and less tyre noise.Lower water draining and decreased aquaplaning resistance.Faster car response times and improved cornering stability.For example, while it might be within 1.5% of the previous replacement, it may very well be outside this range compared to the original tyre and, consequently, the car’s intended design. 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. They are typically larger - upgrading in this way is referred to as plus sizing. Alternatives, on the other hand, have a different size. 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |