2003 Porsche 911 Tire Size

Your Porsche was manufactured with different tire sizes.  To determine the best tire size for your specific 2003 Porsche 911, we first need to determine your rim size.  Please review the information below.

How to Determine Rim Size

Check your existing tires.  Your Porsche 911's rim size is the number to the right of the R.  In the example pictured here, the tire size fits 16-inch rims.

Rim Size Selection

Now that you know your rim size, make a selection below to filter your results.

17-Inch Rims

2003 Porsche 911

 

The original tire size for your 2003 Porsche 911 is listed below. Tap on the box to view a color-coded explanation of your Porsche 911's' tire size.

Trim Options:

CarreraCarrera 4Targa

255/40ZR17(Rear)

Simplified Size:  205-50-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2003 Porsche 911'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:

CarreraCarrera 4Targa

205/50ZR17(Front)

Simplified Size:  255-40-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

205

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

50

This number means that your tire has an aspect ratio of 50%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% 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

18-Inch Rims

2003 Porsche 911

 

There are multiple tire sizes for your 2003 Porsche 911 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 2003 Porsche 911.

Trim Options:

CarreraCarrera 4Carrera 4S

285/30ZR18(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

285

This number indicates that your tire has a width of 285 millimeters.

18

The tire size was designed to fit rims or wheels that are 18 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.

30

This number means that your tire has an aspect ratio of 30%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.  In this case, the sidewall height works out to be 85 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:

CarreraCarrera 4Carrera 4S

225/40ZR18(Front)

Simplified Size:  285-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

225

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

18

The tire size was designed to fit rims or wheels that are 18 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 90 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:

Turbo

295/30ZR18(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

295

This number indicates that your tire has a width of 295 millimeters.

18

The tire size was designed to fit rims or wheels that are 18 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.

30

This number means that your tire has an aspect ratio of 30%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.  In this case, the sidewall height works out to be 88 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:

Turbo

225/40ZR18(Front)

Simplified Size:  295-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

225

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

18

The tire size was designed to fit rims or wheels that are 18 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 90 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:

GT2

315/30ZR18(Rear)

Simplified Size:  235-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 235/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

315

This number indicates that your tire has a width of 315 millimeters.

18

The tire size was designed to fit rims or wheels that are 18 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.

30

This number means that your tire has an aspect ratio of 30%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.  In this case, the sidewall height works out to be 94 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:

GT2

235/40ZR18(Front)

Simplified Size:  315-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2003 Porsche 911 is 235/40ZR18 (Front).  A color-coded explanation of the 2003 Porsche 911's tire size is shown below.

235

This number indicates that your tire has a width of 235 millimeters.

18

The tire size was designed to fit rims or wheels that are 18 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 94 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