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2003 Bmw Z8 Tire Sizes

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2003 BMW Z8 Standard

Front Tire Size (Show Details)
245/45ZR18 96W
245
 This number indicates that your tire has a width of 245 millimeters.
45
 This number indicates that your tire has an aspect ratio of 45%.  This means that your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% 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.
96
 This tire has a load index of 96, which means it's capable of carrying a load of 1566 pounds (710 kg) or less. A higher number means the tire can carry more weight.  A lower number means the opposite.
W
 This tire has a speed rating of W, which means 168 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.
Z
 This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (over 240 km/h). The tire's speed class is less specific than the speed rating.

Rear Tire Size (Show Details)
275/40ZR18 99W
275
 This number indicates that your tire has a width of 275 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.
99
 This tire has a load index of 99, which means it's capable of carrying a load of 1709 pounds (775 kg) or less. A higher number means the tire can carry more weight.  A lower number means the opposite.
W
 This tire has a speed rating of W, which means 168 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.
Z
 This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (over 240 km/h). The tire's speed class is less specific than the speed rating.