Tires Options

[partwerks]

I currently have on the front: 205/55 ZR16
Back: 225/50 ZR16

I was wondering if there is a better size for fit than what I currently have?

[partwerks]

Are the first 3 numbers related to the width of the tire?

If so, I could go to a wider tire for the front, or add a spacer in there somewhere?

I think it would look a bit better if it was closer to the edge of the flair.

The color black is going by the wayside to somewhere between silver, and closer to gray.

[Kansas 914]

Are the first 3 numbers related to the width of the tire?

If so, I could go to a wider tire for the front, or add a spacer in there somewhere?

I think it would look a bit better if it was closer to the edge of the flair.

The color black is going by the wayside to somewhere between silver, and closer to gray.

225/50R16 = 24.9X8.86R16
Diameter = 24.9"
Width = 8.86"
Wheel = 16"
Sidewall = 4.43"
Circumference = 78.1"
Revs/Mile = 811.7

245/50R16 = 25.6X9.65R16
Diameter = 25.6"
Width = 9.65"
Wheel = 16"
Sidewall = 4.82"
Circumference = 80.5"
Revs/Mile = 786.8


The first three numbers in a typical size (225/45R17) are the tire's indicated section width in millimeters, measured from sidewall to sidewall.

If you are familiar with measurements in inches, the section width in millimeters can be converted into inches by dividing it by 25.4. For example:

225mm / 25.4 = 8.86"

The second pair of numbers (225/45R17) is the tire's aspect ratio or profile. This percentage represents the ratio of sidewall’s section height to the tire’s section width. The section height can be calculated by multiplying the section width by the aspect ratio percentage. The answer will be the height of one sidewall. For example:

225mm x 0.45 = 101.3mm
8.86" x 0.45 = 3.99"

The last number (225/45R17) is the diameter of the wheel in inches.

If you are familiar with measurements in the metric system, the wheel diameter can be converted into millimeters by multiplying it by 25.4. For example:

17" x 25.4 = 431.8mm

To calculate the overall diameter of a tire, the sidewall height must be multiplied by 2 (remembering that the tire diameter is made up of 2 sidewalls, the one above the wheel and the one below the wheel touching the ground) and add the diameter of the wheel.

101.3mm + 101.3mm + 431.8mm = 634.4mm
3.99" + 3.99" + 17" = 24.98"