It's inevitable you'll get a puncture at some point. When you do you'll need a spare bike inner tube with you. Use our simple bicycle inner tube guide to discover the right type for your bike.
Before buying a new bicycle inner tube, you'll want to make sure it will fit your wheel rims. The easiest way to do this is by looking at the tyres on your bike. On the sidewall you'll see a combination of digits such as:
700x28c (road wheel) or 27.5x2.2 (mountain bike wheel)
The first figure is the diameter of your wheel, the latter is the width of your tyre.
Inner tubes will fit just one wheel size, so you'll need to match your new tube to your wheel diameter. However, inner tubes will cover a range of tyre widths.
On a product page you'll find inner tubes are labelled with a series of digits:
• 700 x 23-28c (for road bike tubes)
• 29 x 1.75-2.4" (for mountain bike tubes)
The first figure is your wheel diameter while the second two figures are the tyre widths the inner tube can be used with. As long as you match your wheel diameter, and your tyre width falls within the range stated, the tube will fit.
When looking at the side wall of your tyre you may see a combination of digits such as 54-559 or 23-622.
This is ETRTO sizing but we recommend you use the Imperial/Metric sizing above as most cycle inner tubes we stock use this standard.
The easiest way to determine if you need a Presta or Schrader inner tube valve is to again look at your current bike inner tube.
Punctures are inevitable. Instead of having to lug around spare inner tubes with you, you can opt for a self-sealing inner tube. These bike inner tubes are delivered with tube sealant already inside. When you get a puncture the sealant will plug the gap so you can keep riding.