tire size calculator in metric system. used in Europe

Tire size calculator.Find similar tyre size of rim and wheel

Metric System

Tyres with a difference above 3% doesn't provide an accurate reading of speedometer

Are you going to renew your tires? Looking to compare tire sizes before you buy? Do you want to see your car with sporty look? Be careful with the changes. Tire sizes are a bit demanding when it comes to understanding what size they really are. Those numbers are only good with the other two. Although inches system is more understable than metric one, (a 33" is a 33" no matter what, but a 265/70/16 is a 30 1/2" tall tire and a 265/75R17 is a 32 1/2" tall tire and it's difficult understand it) you cannot calculate with your imagination implications of changing a half of inch. Use our tire converter to compare wheels of both type of metrics or to understand metric tire sizes. Differences above 3% in real diameter avoid accurate readings in speedometer. So you can be fined easily if you don't take into account this point.

Did you know many makers calibrate their vehicles 5% below of real speed ?

They practise this to help you to avoid fines. If you don't use calculators like this and increment diameter too much, you probably will be entering in fines zone without know it

Did you know than a low pressure in your tires increment consumption and can affect speedometer accurate reading?

Although in this case, readings will be higher than real speed , consumption will be affected . This is particurally important in electric vehicles.

You can also use this site as a tyre, tire or rim size calculator. With it, you can find a similar tyre tire effortless. If you enter original tyre and you let as zero one of the dimensions for new wheel rim, this calculator will find a similar tyre size of rim and wheel calculating by you the dimension you have let as zero

identification dimensions tyre width speed code height calculator wheel tire offset
Numbers meaning:
(1) Nominal width of tyre in mm (2) Ratio of height as a percentage of the width (3) Tyre type
(4) Rim diameter in inches (5) load index (6) speed symbol

Enter data. All fields are mandatory

Original wheel / tyre data

New wheel / tyre data