2005 Porsche 911 Tire Size

Your Porsche was manufactured with different tire sizes.  To determine the best tire size for your specific 2005 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

2005 Porsche 911

 

There are multiple tire sizes for your 2005 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 2005 Porsche 911.

Trim Options:

Carrera (997)

255/40R17/RF 98V(Rear)

Simplified Size:  205-50-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50R17 89V (Front).  A color-coded explanation of the 2005 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.

RF

The mark of RF indicates that the tire is reinforced.  This means it can handle a higher inflation pressure than a standard tire, which increases its maximum load.

98

This tire has a load index of 98, which means it's capable of carrying a load of 1650 pounds (750 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
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.

Trim Options:

Carrera (997)

205/50R17 89V(Front)

Simplified Size:  255-40-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50R17 89V (Front).  A color-coded explanation of the 2005 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.

89

This tire has a load index of 89, which means it's capable of carrying a load of 1276 pounds (580 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
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.

Trim Options:

Carrera (996)

255/40R17(Rear)

Simplified Size:  205-50-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2005 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.

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:

Carrera (996)

205/50ZR17(Front)

Simplified Size:  255-40-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2005 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

Trim Options:

Targa

255/40ZR17(Rear)

Simplified Size:  205-50-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2005 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:

Targa

205/50ZR17(Front)

Simplified Size:  255-40-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 205/50ZR17 (Front).  A color-coded explanation of the 2005 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

2005 Porsche 911

 

There are multiple tire sizes for your 2005 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 2005 Porsche 911.

Trim Options:

GT2 (Winter Tires)Turbo (Winter Tires)Turbo S (Winter Tires)

265/35R18 93H(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40R18 88H (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

265

This number indicates that your tire has a width of 265 millimeters.

18

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

93

This tire has a load index of 93, which means it's capable of carrying a load of 1430 pounds (650 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

35

This number means that your tire has an aspect ratio of 35%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width.  In this case, the sidewall height works out to be 92 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
H

This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

GT2 (Winter Tires)Turbo (Winter Tires)Turbo S (Winter Tires)

225/40R18 88H(Front)

Simplified Size:  265-35-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40R18 88H (Front).  A color-coded explanation of the 2005 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.

88

This tire has a load index of 88, which means it's capable of carrying a load of 1232 pounds (560 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
H

This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

Carrera 4S (Winter Tires)GT3 (Winter Tires)

265/35R18/RF 97V(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40R18/RF 92V (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

265

This number indicates that your tire has a width of 265 millimeters.

18

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

RF

The mark of RF indicates that the tire is reinforced.  This means it can handle a higher inflation pressure than a standard tire, which increases its maximum load.

97

This tire has a load index of 97, which means it's capable of carrying a load of 1606 pounds (730 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

35

This number means that your tire has an aspect ratio of 35%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width.  In this case, the sidewall height works out to be 92 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
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.

Trim Options:

Carrera 4S (Winter Tires)GT3 (Winter Tires)

225/40R18/RF 92V(Front)

Simplified Size:  265-35-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40R18/RF 92V (Front).  A color-coded explanation of the 2005 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.

RF

The mark of RF indicates that the tire is reinforced.  This means it can handle a higher inflation pressure than a standard tire, which increases its maximum load.

92

This tire has a load index of 92, which means it's capable of carrying a load of 1386 pounds (630 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
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.

Trim Options:

Carrera (996)

285/30ZR18(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2005 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:

Carrera (996)

225/40ZR18(Front)

Simplified Size:  285-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2005 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:

Carrera (996)Carrera 4STurboTurbo S

295/30ZR18(Rear)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2005 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:

Carrera (996)Carrera 4STurboTurbo S

225/40ZR18(Front)

Simplified Size:  295-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 225/40ZR18 (Front).  A color-coded explanation of the 2005 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:

Carrera (997)

265/40R18 97V(Rear)

Simplified Size:  235-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40R18 91V (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

265

This number indicates that your tire has a width of 265 millimeters.

18

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

97

This tire has a load index of 97, which means it's capable of carrying a load of 1606 pounds (730 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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 106 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
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.

Trim Options:

Carrera (997)

235/40R18 91V(Front)

Simplified Size:  265-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40R18 91V (Front).  A color-coded explanation of the 2005 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.

91

This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
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.

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 2005 Porsche 911 is 235/40ZR18 (Front).  A color-coded explanation of the 2005 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 2005 Porsche 911 is 235/40ZR18 (Front).  A color-coded explanation of the 2005 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

Trim Options:

Carrera (997)

265/40ZR18/XL (101Y)(Rear)

Simplified Size:  235-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40ZR18 91(Y) (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

265

This number indicates that your tire has a width of 265 millimeters.

18

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

XL

The mark of XL means extra load.  A tire with this designation can handle higher inflation pressures than a regular tire, which increases its maximum load.

101

This tire has a load index of 101, which means it's capable of carrying a load of 1815 pounds (825 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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 106 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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

Carrera (997)

235/40ZR18 (91Y)(Front)

Simplified Size:  265-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40ZR18 91(Y) (Front).  A color-coded explanation of the 2005 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.

91

This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

GT3

295/30ZR18/RF (98Y)(Rear)

Simplified Size:  235-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40ZR18 91(Y) (Front).  A color-coded explanation of the 2005 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.

RF

The mark of RF indicates that the tire is reinforced.  This means it can handle a higher inflation pressure than a standard tire, which increases its maximum load.

98

This tire has a load index of 98, which means it's capable of carrying a load of 1650 pounds (750 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

GT3

235/40ZR18 (91Y)(Front)

Simplified Size:  295-30-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/40ZR18 91(Y) (Front).  A color-coded explanation of the 2005 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.

91

This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

19-Inch Rims

2005 Porsche 911

 

The original tire size for your 2005 Porsche 911 is listed below. Tap on the box to view a color-coded explanation of your Porsche 911's' tire size.

Trim Options:

Carrera (997)Carrera SCarrera S (Full Load)

295/30ZR19/RF (100Y)(Rear)

Simplified Size:  235-35-19

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/35ZR19 87(Y) (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

295

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

19

The tire size was designed to fit rims or wheels that are 19 inches in diameter.

RF

The mark of RF indicates that the tire is reinforced.  This means it can handle a higher inflation pressure than a standard tire, which increases its maximum load.

100

This tire has a load index of 100, which means it's capable of carrying a load of 1760 pounds (800 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

Carrera (997)Carrera SCarrera S (Full Load)

235/35ZR19 (87Y)(Front)

Simplified Size:  295-30-19

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Porsche 911 is 235/35ZR19 87(Y) (Front).  A color-coded explanation of the 2005 Porsche 911's tire size is shown below.

235

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

19

The tire size was designed to fit rims or wheels that are 19 inches in diameter.

87

This tire has a load index of 87, which means it's capable of carrying a load of 1199 pounds (545 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

35

This number means that your tire has an aspect ratio of 35%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width.  In this case, the sidewall height works out to be 82 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
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.