Bicycle Inner Tube Size Conversion Chart

On a product page you ll find inner tubes are labelled with a series of digits.

Bicycle inner tube size conversion chart. If you are facing and should change the tires on your bike it is important that you choose the right bicycle tire sizes for your bike wheels. 700 x 23 28c for road bike tubes 29 x 1 75 2 4 for mountain bike tubes. Pneumatic tires are superior in providing effective cushioning while keeping rolling resistance very low. I am going crazy trying to find exactly what size inner tube to get.

However inner tubes will cover a range of tyre widths. 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. This is to allow the tube to expand to the correct size for your tires and can range from as narrow as an inch right up to a tire width of 2 5 or greater. 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.

So they re sold by fixed diameter and range of widths e g. Over time different countries and different manufacturers have built up a system that is so complex that probably only 2 or 3 people in the world actually understand it. Inner tubes will fit just one wheel size so you ll need to match your new tube to your wheel diameter. Finding the right inner tube depends on the size of the tires on your bike.

Mtb tubes must be the correct width as well also measured in inches. Choosing an inner tube what size inner tube should i choose for my bike. So a 29 inch mtb tube will have the same diameter as a 700c road wheel while a 27 5 inch tube will be the same diameter as a 650b road wheel. Mtb wheels in particular can be further categorised by 26 inches 27 5 inches and 29 inches.

The size of an inner tube varies with the amount of air that you fill them with. There are a myriad of wheel sizes for road mtb touring and children s bikes. Mountain bike tubes range in size from 26 through to a 27 5 and 29. The chart that explains things the european tyre and rim technical organisation in conjunction with the international organization of standardization developed a unified system of notation.

Bicycle inner tube size conversion chart plus recommendations june 1 2020 by ben. The sad fact is that inner tube sizing and tire sizing for that matter is a dark art. Each tire size is very variable depending on the type of bicycle tire you want and depending on what type of bike you have. When it comes to replacing your inner tube how do you know which size you need for your bike.

A bicycle inner tube with valve stem in a pneumatic tire pressurized air is held inside either with a separate relatively impermeable inner tube or by the tire and rim in a tubeless system.