1990 Infiniti Q45 Tire Size

The original tire size for your 1990 Infiniti Q45 is listed below. Tap on the box to view a color-coded explanation of the best Infiniti Q45 tire size.

P215/65VR15

Simplified Size:  215-65-15

Simplified size is useful for shopping and buying tires.

The original tire size for your 1990 Infiniti Q45 is P215/65VR15.  A color-coded explanation of the 1990 Infiniti Q45's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
215

This number indicates that your tire has a width of 215 millimeters.

65

This number means that your tire has an aspect ratio of 65%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% of the width.  In this case, the sidewall height works out to be 139 millimeters.

V

This tire has a speed rating of V, which means 149 mph (240 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

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
15

The tire size was designed to fit rims or wheels that are 15 inches in diameter.