Table of Contents

## How do you calculate tire diameter?

We know the diameter of the wheel is 15 inches, so the diameter of the tire is given by: tire diameter = wheel diameter + (2 * sidewall height)

## What is acceptable tire diameter difference?

Generally, it is recommended to not exceed a 3% difference when changing from the OEM size on a non-modified vehicle. A green row means that the alternate tire diameter matches the calculated tire diameter.

## How do you determine bike tire size?

Look at the side of your current tires to see what size you need.

- The first number is the tire diameter. The most common options are 26in., 27.5in. and 29in.
- The second number is the width of the tire. This number is expressed in inches for mountain bike tires and in millimeters for road tires.

## Can I change the diameter of my tire?

It’s possible to change the size of your tires without actually changing the diameter. Generally, you don’t want to go with tires that have a diameter that is more than 3% different from the factory tires. It’s also a good idea to consult with a trusted mechanic before switching to larger or smaller tires.

## What is the circumference of a tire with a diameter of 25 in?

Diameter, Rollout (Circumference) And Revolutions Per Mile Chart

Diameter | Rollout | Revs/Mile* |
---|---|---|

24 | 75.4 | 877 |

24.5 | 77.0 | 858 |

25 | 78.5 | 840 |

25.5 | 80.1 | 823 |

## What is the diameter of a 22.5 tire?

Plus Sizes

235/80-22.5 | 255/70-22.5 | |
---|---|---|

Diameter inches (mm) | 37.3 (947.5) | 36.56 (928.5) |

Width inches (mm) | 9.25 (235) | 10.04 (255) |

Circum. inches (mm) | 117.19 (2976.66) | 114.84 (2916.97) |

Sidewall Height inches (mm) | 7.4 (188) | 7.03 (178.5) |

## How much can you go up or down in tire size?

As a general rule of thumb, it’s safe to fit a tire up to 20 millimeters wider than stock on the original rim. The actual width of the tire will vary depending on the width of the rim: The tire will expand 5 millimeters for every half inch (12.5 millimeters) increase in rim width.

## Are 285 tires the same as 33?

YES, 285 wide tires are the same as 33” tires although 285 is the tread width in millimeters and 33″ is the tire diameter. 285/75/16 is usually the accepted metric equivalent size for 33’s.

## Is a 28 inch tire the same as 700C?

The tyres can differ, but the 28”, 700C and 29er are all the exact same rim diameter. The 700 markings will be followed by the width in mm, and the 28 or 29 markings will be followed by the width in inches.

## What size bike tires do I need for my height?

Size Chart for Mountain Bikes

Height (ft/in) | Height (cm) | Suggested Wheel Size |
---|---|---|

4’10 – 5’3″ | 147-160cm | 26″ |

5’4 “- 5’7” | 160 – 170cm | 26″ |

5’5″ – 5’9″ | 165 – 175cm | 27.5″ |

5’9″ – 6’0″ | 175 – 183cm | 27.5″ |

## How does the tire size comparison calculator work?

The tire size comparison calculator takes the measurements of two tires and compares the diameter, width, sidewall, circumference, and revolutions per mile. Then as a bonus it shows examples of your speedometer reading with the first tire, and the actual speed you’re traveling if you were to install the second tire.

## How to compare tire size with speedometer calibration?

If you would like to see more speedometer calibration speeds at a time, visit our tire size comparison page to compare different metrics of tires and get multiple speedometer calibration readings at once. By using our site you agree to our policies including the use of cookies.

## What is the third number on a tire calculator?

Tire Calculator. The third number generally preceded by an “R” is the wheel diameter. The sidewall or aspect ratio are used in metric tire sizes to determine the overall height of a tire. The second number on a metric tire is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tire.

## What are the dimensions of a metric tire?

The second number on a metric tire is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tire. This second number is that percent. The sidewall height or “aspect ratio” of a 285/75/R16 tire is 75% of 285mm. Example: 285/75R16 (285 X 75 / 2540 x 2) + 16 = 32.8 inches tall.

## When to replace PAX tires, how heavy should the wheel be?

Tire Rack should be able to help you with the TPMS question. There also might be some information in your owners manual. And @VDCdriver is exactly right, lighter is better. An alternative might be to see if a dealer or a wheel store has an appropriate set of Honda ‘take off’ wheels (non-PAX) that would fit.

The tire size comparison calculator takes the measurements of two tires and compares the diameter, width, sidewall, circumference, and revolutions per mile. Then as a bonus it shows examples of your speedometer reading with the first tire, and the actual speed you’re traveling if you were to install the second tire.

If you would like to see more speedometer calibration speeds at a time, visit our tire size comparison page to compare different metrics of tires and get multiple speedometer calibration readings at once. By using our site you agree to our policies including the use of cookies.

Tire Calculator. The third number generally preceded by an “R” is the wheel diameter. The sidewall or aspect ratio are used in metric tire sizes to determine the overall height of a tire. The second number on a metric tire is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tire.