650C

Need an inner tube for your old time trial bike or Tokyo bike? Check out our range of 650C bicycle tubes to suit your wheels!

A quick run down on how inner tube sizing works

Your inner tube is the ‘balloon’ inside your tyre which punctures!

To find the right size tube you need to consult the sidewall of your tyre.

Your tyre should have somewhere on it printed into the rubber itself (harder to see) or branded on the side, it’s size.

The size format may be something like 650 x 23c or it may say 23-571. Sometimes it will have both, because this is French & British measurements.

The big number in both of these examples represents the tyre circumference, and the smaller number represents the width of the tyre.

So you are looking for an inner tube that matches your tyre size.

However, you will notice that inner tubes have a range of sizes that they cover (most of the time).

This is because inner tubes are balloons, so an inner tube can suit a variety of sizes as it inflates inside the tyre.

For instance a 650 x 23c tyre, can use an inner tube which is 650 x 23-25c. Because the inner tube will suit both a narrower 23c tyre, as well as a 25c tyre.

Our hot tip for choosing an inner tube when you have options of ranges is to choose the one which is on the smaller size.

This is to make fitting the tube inside the tyre easier. While they will both fit your tyre, and will both work just fine, one is a better fit. And therefore a little easier to feed into your tyre.

And anything which makes fitting a tube in a tyre easier is a good thing!

If you’re still unsure about what size tube you need we can absolutely help! Give us a call or send us photos of your tyre if you are lost and we can figure it out for you.