1985 Oldsmobile Calais Tire Size

There are multiple tire sizes for your 1985 Oldsmobile Calais that depend upon the trim level.  Look for your trim level below to get a color-coded explanation of your tire size.  Then pick the best tire size for your 1985 Oldsmobile Calais.

P185/80R13

Simplified Size:  185-80-13

Simplified size is useful for shopping and buying tires.

The original tire size for your 1985 Oldsmobile Calais is P185/80R13.  A color-coded explanation of the 1985 Oldsmobile Calais's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
185

This number indicates that your tire has a width of 185 millimeters.

80

This number means that your tire has an aspect ratio of 80%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 80% of the width.  In this case, the sidewall height works out to be 148 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
13

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

Trim Options:

500BaseSupreme

P205/70R13

Simplified Size:  205-70-13

Simplified size is useful for shopping and buying tires.

The original tire size for your 1985 Oldsmobile Calais is P205/70R13.  A color-coded explanation of the 1985 Oldsmobile Calais's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
205

This number indicates that your tire has a width of 205 millimeters.

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 143 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
13

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