1983 Renault R18i Tire Size

The original tire size for your 1983 Renault R18i is listed below. Tap on the box to view a color-coded explanation of the best Renault R18i tire size.

The original tire size for your 1983 Renault R18i is 175/70SR13 S.  A color-coded explanation of the 1983 Renault R18i's tire size is shown below.

175

This number indicates that your tire has a width of 175 millimeters.

13

The tire size was designed to fit rims or wheels that are 13 inches in diameter.

70

This number means that your tire has an aspect ratio of 70%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width.  In this case, the sidewall height works out to be 122 millimeters.

R

This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

RRadial
BBias Belt
DDiagonal
S

This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.