What does SR (followed by a number) on the side of tires mean?

3 Answers

• Naughtums

  1 month ago

  “SR” is an obsolete way of expressing the speed capability of a tire using a now largely discarded sizing standard. The size might read something like “P175/70SR13” undre this old system. The same tire under the current sizing standard would read “P175/70R13 82S” In both cases the “R” means the tire is of radial construction, the “S” indicates the tire has a speed capability of 112mph.

  0
• phil t

  1 month ago

  i believe that it stands for steel radial…which means that when the tire gets worn down, you will see the steel actually coming out of the tire…dont touch, it’s sharp.

  1
• Anonymous

  1 month ago

  speed rated

  0