Tyre upsizing

by Editor News

Tyre Upsizing means changing your regular tyres with wider ones so as to enhance the tyre performance and give them a modern appearance. There are two things that can be done to upsize a tyre; selecting a wider tyre and/or choosing a larger wheel.

In the process of upsizing a tyre, there are certain things one should keep in mind:

  • The overall diameter of the tyre should not exceed beyond 3% of the original size.

  • In the process of upsizing the tyre it should not become too heavy as heaviness leads to lesser fuel efficiency.

Upsizing works on the concept of increasing the wheel size and decreasing the profile of the tyre so as to achieve greater look and performance and maintain its original size as well. There are three types of tyre upsizes which are explained below:

  • Plus zero- The combination of OE tyre wheel diameter with a tyre which has a lower aspect ratio and a larger section width than the OE tyre.

  • Plus one- The combination of a one inch larger diameter with a tyre which has one step lower aspect ratio than the OE tyre.

  • Plus two- The combination of a two inch larger diameter with a tyre which has two step lower aspect ratio than the OE tyre.

Tyre upsizing calculation method

There is not much scope to increase the Total Diameter of the tyre that comes originally fitted in your car.

Total Diameter = Wheel/Rim Diameter + Sidewall

For a safe upsized of tyre, one should only increase the total diameter by 3%. Therefore, one should calculate the diameter of the originally fitted tyre and the new tyre and compare them.
If the difference lies within this range of 3 %, then only the tyre is a recommended upsized tyre.




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