Bicycle Tire Sizes Conversion Charts

When it is time to replace your well worn tires it is a good opportunity to unlock the full potential of your wheels by trying something new.

Bicycle tire sizes conversion charts.

Bicycle tires come in a variety of sizes and with time the international organization for standardization iso has developed a universal system to better understand and regulate tire and rim sizing. Tire size chart for bicycle rim. Competing tire and wheel measurement systems can make finding the right tire for vintage bikes extremely challenging. This chart will provide guidance on what tires sizes can match your internal rim width.

Measure your bicycle wheel and tire size with table. For standard hardtails our mountain bike size chart should be a god send. 26 iso size 559 is the most commonly used size for modern mountain bikes and is also used by many hybrid bikes. Take the rim with you when buying a tire and vice versa.

Tire size chart for bicycle rim. Most lists the tire size both english french and german targets and rim circumference in millimeters. Mountain bike sizing can be affected by suspension and your tire choices. Conversion tables for common bicycle tire sizes.

Given rim diameter the iso diameter and tire diameter the size of your tire converted to millimeters wheel diameter rim diameter tire diameter 2. Wheel circumference wheel diameter pi. The tire size chart below includes bicycle tire sizes and how they are commonly written. The late bicycle mechanic sheldon brown noted that there were four different types of 26 inch wheels developed in different countries and by different manufacturers that used fractional measurements for width such as 1 1 4.

If you are unsure of your bicycle tire size you can look into a bicycle tire table where you can easily and simply find just the tires that fit your bike. The standard is called the iso 5775 and if your shop doesn t have the chart available it is published at the websites of the iso and the etrto. Sizes of 26 and 24 tubulars are not well standardized. 27 iso size 630 is an older size that was used for road bikes but since so many bikes were built with this size it is still readily available.

To convert tire tube sizes from one notation to another it is necessary to use the chart published by the iso available at any reputable bike shop. There are five tire diameter sizes that are in common use on modern standard adult bicycles. Mountain bike size chart.