1993 Porsche 928 Tire Size

The original tire size for your 1993 Porsche 928 is listed below. Tap on the box to view a color-coded explanation of the best Porsche 928 tire size.

Trim Options:

GTS

255/40ZR17(Rear)

Simplified Size:  225-45-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 1993 Porsche 928 is 225/45ZR17 (Front).  A color-coded explanation of the 1993 Porsche 928's tire size is shown below.

255

This number indicates that your tire has a width of 255 millimeters.

17

The tire size was designed to fit rims or wheels that are 17 inches in diameter.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

40

This number means that your tire has an aspect ratio of 40%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.  In this case, the sidewall height works out to be 102 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

Trim Options:

GTS

225/45ZR17(Front)

Simplified Size:  255-40-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 1993 Porsche 928 is 225/45ZR17 (Front).  A color-coded explanation of the 1993 Porsche 928's tire size is shown below.

225

This number indicates that your tire has a width of 225 millimeters.

17

The tire size was designed to fit rims or wheels that are 17 inches in diameter.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

45

This number means that your tire has an aspect ratio of 45%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width.  In this case, the sidewall height works out to be 101 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