2005 Mazda RX-8 Tire Size

Your Mazda was manufactured with different tire sizes.  To determine the best tire size for your specific 2005 Mazda RX-8, we first need to determine your rim size.  Please review the information below.

How to Determine Rim Size

Check your existing tires.  Your Mazda RX-8'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.

16-Inch Rims

2005 Mazda RX-8

 

The original tire size for your 2005 Mazda RX-8 is listed below. Tap on the box to view a color-coded explanation of your Mazda RX-8's' tire size.

Trim Options:

(4-Speed Automatic)

225/55R16 94V

Simplified Size:  225-55-16

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Mazda RX-8 is 225/55R16 94V.  A color-coded explanation of the 2005 Mazda RX-8's tire size is shown below.

225

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

55

This number means that your tire has an aspect ratio of 55%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 55% of the width.  In this case, the sidewall height works out to be 123 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
16

The tire size was designed to fit rims or wheels that are 16 inches in diameter.

94

This tire has a load index of 94, which means it's capable of carrying a load of 1474 pounds (670 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

18-Inch Rims

2005 Mazda RX-8

 

The original tire size for your 2005 Mazda RX-8 is listed below. Tap on the box to view a color-coded explanation of your Mazda RX-8's' tire size.

Trim Options:

(4-Speed Automatic)(6-Speed Manual)Shinka

225/45R18 91W

Simplified Size:  225-45-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2005 Mazda RX-8 is 225/45R18 91W.  A color-coded explanation of the 2005 Mazda RX-8's tire size is shown below.

225

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

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
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.

W

This tire has a speed rating of W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.