Tire Size for 2003 Porsche 911

2003 Porsche 911 Tire Sizes

Select a box to get your vehicle's tire size.

Front Tire Size (Show Details)

205/50ZR17

205	This number indicates that your tire has a width of 205 millimeters.
50	This number indicates that your tire has an aspect ratio of 50%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
17	The tire size was designed to fit rims that are 17 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Rear Tire Size (Show Details)

255/40ZR17

255	This number indicates that your tire has a width of 255 millimeters.
40	This number indicates that your tire has an aspect ratio of 40%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
17	The tire size was designed to fit rims that are 17 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Front Tire Size (Show Details)

225/40ZR18

225	This number indicates that your tire has a width of 225 millimeters.
40	This number indicates that your tire has an aspect ratio of 40%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Rear Tire Size (Show Details)

285/30ZR18

285	This number indicates that your tire has a width of 285 millimeters.
30	This number indicates that your tire has an aspect ratio of 30%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Front Tire Size (Show Details)

225/40ZR18

225	This number indicates that your tire has a width of 225 millimeters.
40	This number indicates that your tire has an aspect ratio of 40%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Rear Tire Size (Show Details)

285/30ZR18

285	This number indicates that your tire has a width of 285 millimeters.
30	This number indicates that your tire has an aspect ratio of 30%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Front Tire Size (Show Details)

235/40ZR18

235	This number indicates that your tire has a width of 235 millimeters.
40	This number indicates that your tire has an aspect ratio of 40%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Rear Tire Size (Show Details)

315/30ZR18

315	This number indicates that your tire has a width of 315 millimeters.
30	This number indicates that your tire has an aspect ratio of 30%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Front Tire Size (Show Details)

225/40ZR18

225	This number indicates that your tire has a width of 225 millimeters.
40	This number indicates that your tire has an aspect ratio of 40%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.

Rear Tire Size (Show Details)

295/30ZR18

295	This number indicates that your tire has a width of 295 millimeters.
30	This number indicates that your tire has an aspect ratio of 30%. This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.
R	This letter indicates how your tire was constructed. Radial is the standard construction method for about 98% of all tires sold today. R = Radial B = Bias Belt D = Diagonal
18	The tire size was designed to fit rims that are 18 inches in diameter.
Z	This tire has a speed rating of Z, which means it has been tested to travel slightly faster than 149 mph (240 km/h) for a duration of 10 minutes.