Take the rim with you when buying a tire and vice versa.
Bicycle tire sizes conversion charts.
Tire size chart for bicycle rim.
There are five tire diameter sizes that are in common use on modern standard adult bicycles.
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.
Measure your bicycle wheel and tire size with table.
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.
Most lists the tire size both english french and german targets and rim circumference in millimeters.
Competing tire and wheel measurement systems can make finding the right tire for vintage bikes extremely challenging.
26 iso size 559 is the most commonly used size for modern mountain bikes and is also used by many hybrid bikes.
Given rim diameter the iso diameter and tire diameter the size of your tire converted to millimeters wheel diameter rim diameter tire diameter 2.
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.
For standard hardtails our mountain bike size chart should be a god send.
Mountain bike size chart.
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.
So make sure you look at a tire size chart and try a full suspension mountain bike for size before buying.
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.
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.
Mountain bike sizing can be affected by suspension and your tire choices.
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.
Size variations of tubulars are covered in sutherland s handbook for bicycle mechanics 7th edition available from sutherland s and on the mechanic s bookshelf at better bike shops.
The tire size chart below includes bicycle tire sizes and how they are commonly written.
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.
