Bicycle Tire Sizes Conversion Charts

Tire size chart for bicycle rim.

Bicycle tire sizes conversion charts.

Conversion tables for common bicycle tire sizes. 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. The tire size chart below includes bicycle tire sizes and how they are commonly written. Mountain bike sizing can be affected by suspension and your tire choices.

There are five tire diameter sizes that are in common use on modern standard adult bicycles. 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. Nowadays bike tires are typically marked according to iso standard a system originally developed by etrto european tire and rim technical organization but older english and french tire size dimensions are still used as well use the data from the following tables to determine interchangeability and convert between iso etrto english. 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.

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. Wheel circumference wheel diameter pi. Most lists the tire size both english french and german targets and rim circumference in millimeters. Tire size chart for bicycle rim.

Competing tire and wheel measurement systems can make finding the right tire for vintage bikes extremely challenging. 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. Given rim diameter the iso diameter and tire diameter the size of your tire converted to millimeters wheel diameter rim diameter tire diameter 2. For standard hardtails our mountain bike size chart should be a god send.

So make sure you look at a tire size chart and try a full suspension mountain bike for size before buying. Take the rim with you when buying a tire and vice versa. This chart will provide guidance on what tires sizes can match your internal rim width. 26 iso size 559 is the most commonly used size for modern mountain bikes and is also used by many hybrid bikes.

Sizes of 26 and 24 tubulars are not well standardized. Measure your bicycle wheel and tire size with table. Mountain bike size chart.