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# How To Measure A Bike Tire Tube

### Tips regarding bicycle tire and rim sizes.

How to measure a bike tire tube. Bike tube sizing essentially mirrors bike tire sizing with one exception. Inspect the side of the tire that needs a replacement inner tube. This is commonly done using inches although millimeters can be used as well. For example choose a tube for a mountain bike if the width is within inch of the tire s stated width.

Different bike types use vastly different sizes. Road bike tires generally come in three widths. 26 x 1 95 2 125 indicating that the tube is intended to fit a 26 inch tyre with a width of between 1 95 inches and 2 125 inches. The basics of bike tire sizing duration.

The larger number is the tire diameter while the smaller number is the tire width. For example 26 x 1 87 indicates that the wheel is 26 inches in diameter and 1 87 inches in width. Tubes because they can stretch will list a range of widths. The letter at the end of a tire size is a throwback to an old french system when the letters a b and c designated different inner tire diameters it does not stand for cm.

Learn what tubes will fit your tires if you can t find the exact right size. If your tires are dirty or worn it may be difficult to locate the print. Next multiple the radius by 2 to get the diameter. Below we prepared a tabel with rim sizes of 4 different bicycle types and their equivalents in inch etrto and french standards.

Bike tires 101. Thus you need to be sure any new bike tube has sizing that has a width range that aligns with the sizing on your bike tires. Finding the right inner tube depends on the size of the tires on your bike. 27 5 x 1 9 2 3 for example.

Because the stated tire width is usually slightly larger than the actual tire and because the tube stretches tubes close in width serve just as well. Then use a tape measure to measure the distance from the ground underneath the tire to the center of the wheel to get the radius. Before measuring it s good to know what the numbers indicate in the first place. Generally speaking the width of the tire should remain within the interval obtained by multiplying the inner width of the rim with 1 45 and respectively 2.

The tire size is printed on the side wall of the tire. 23c 25c and 28c their width in mm. Inner tubes typically state a wheel diameter and width range for which they will work e g. How to get the right bike tube and valve size.

To measure a bicycle wheel start by standing the bike upright by leaning it against a wall or using the kickstand. When it comes to choosing width there are two major factors at play.

### Diy Top Tube Bag For Bikepacking Touring Diy Tops Bikepacking

Source : pinterest.com