To prevent a ride gone haywire, you need to find the best inner tube size for your wheels. But there are quite a few tube sizes out there. Before you head to your local cycling shop or sporting goods store, take a look at your tires and remember the size written on the rubber.
What Is a Bike Inner Tube
Bike inner tubes are inflatable rubber or latex tubes that sit on the inside of your bike tire and help keep your ride safe and smooth, according to the Evans Cycles purchase manual. While there are tubeless tires out there, these structures are an essential part of most bicycles, whether you're riding a road or mountain bike.
To find the right inner tube for your bike, you need to find one that will fit the diameter and width of your tires, which is found written on the tire itself. When you buy an inner tube, the packaging will usually list which diameter and width it fits, according to the purchase manual.
For example, if an inner tube says it's best for 26 x 1.95-2.125", that means the tube should be used for a 26-inch tire with a width between 1.95 and 2.125 inches.
Some road bikes use 700c tires, which use millimeter-sized inner tubes. If you see an inner tube package labeled 700 x 18-23c, that means the inner tubes work with tires that are 18 to 23 millimeters wide.
Finding the Right Inner Tube
Finding the right inner tube depends on the size of the tires on your bike. While you can find a variety of bikes with wheel sizes ranging from 16 to 27.5 inches, the most common sizes include 26 inches, 27.5 inches, 29 inches and 700c.
Tubes can range anywhere from 1 to 3 inches or 19 to 45 millimeters, depending on the type of wheels you have. Since tubes are flexible and stretchy, they're typically sold in a range of widths. You just need to make sure the tire diameter for the tube is exact.
Let's say your wheels have a 26-inch diameter and a 1.3-inch width. As long as you buy tubes made for a 26-inch diameter wheel, you can buy any range of tube width that covers 1.3. If you find a tube that's 26 x 1.1-1.5" for instance, that will fit your tires. Or, if you find a tube that's 26 x 1.2-1.7", that will work, too.
Common Inner Tube Ranges for 26-Inch, 27.5-Inch and 29-Inch Tire Diameters
- 1.0 to 1.15 inches
- 1.25 to 2.0 inches
- 2.0 to 2.35 inches
- 2.4 to 3.0 inches
Common Inner Tube Ranges for 700c Tire Diameter
- 18 to 23 millimeters
- 20 to 25 millimeters
- 28 to 32 millimeters
- 35 to 43 millimeters