How big is a 135 R15 tire

What do the numbers and letters on the tire mean?

Have you ever taken a close look at your car tire? On the side wall there is a code consisting of numbers and letters, such as:185/65 R15 88 T. But what does this combination mean? You'll find the answer below, but first let's get closer to the theory.

The tire dimension in theory

Read from left to right the numbers or letters say the following about the tire:

  • Nominal width of the tire in millimeters
  • relationship from the flank height (shaft height) to the tread width in percent
  • Is it aDiagonal- orRadial tires? (So ​​the construction of the carcass)
  • How tall is heRim diameter in inches?
  • Which value (in kilograms) resultsLoad index?
  • What is the maximum loud speedSpeed ​​index (Speed ​​category)?
  • additional Designations

Buy winter tires online

Danger: When buying winter tires, it is essential to pay attention to the dimensions. If in doubt, please consult the vehicle description or ask a trusted workshop.

The tires listed here all come from last year's winter tire test, the results from 2019 will be published here at the end of September.

The top 5 in size 175/65 R14

Continental WinterContact TS 860 - 175/65 R14 82T - D / B / 71 - winter tires (car)
  • Rely on impressive braking performance on wet winter days
  • Trust in reliable braking even on wintry roads
  • Stay on track even in snow - especially when cornering
  • Auto Zeitung Ausgabe (24/2020) tested the size 205/55 R 16. Quality rating for the WinterContact TS 860: "Very recommendable". Unreserved recommendation and the best ...
  • Scope of delivery: 1x Continental WinterContact TS 860 - 175/65 R14 82T - D / B / 71 - winter tires (car) - tires without rim (please select the correct quantity before purchasing)

The top 4 in size 205/55 R16

The tire dimension in practice

So for example can be due to the dimension185/65 R15 88 T the following can be determined:

  • The tire width is185 mm
  • The tire cross-section, i.e. the percentage ratio of the side height to the tire width, is65 %
  • R. tells us that it is a radial tire
  • The tire inner diameter is15 inch
  • According to the load index88 the maximum permissible load per tire is 560 kg
  • The code letterT The speed index means that a maximum speed of 190 km / h is permitted

Graphic: What does the code on the tire mean?


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