When looking for a new inner tube or tyre, a good starting point is to have a look at the size and dimensions of your current setup.
To find that out, simply check the side of your tyre - the dimensions should be embossed or printed on the side.
Here's what to look out for:
Referring to the diameter of the wheel. Depending on what type of bicycle you have, this measurement may be in inches or millimetres.
The size of the tyre/innertube MUST match the wheel. Any different combination will not work.
This refers to the cross-sectional diameter of the tyre when inflated.
This dimension is generally found together with the tyre size when printed on the tyre. eg. 27.5 x 2.0 inches or 700 x 25mm.
When choosing a new innertube, look out for the range of widths that the innertube can accommodate.
Your tyre should fall within that range, if not, you might run a higher risk of puncturing the inner tube, or the tube may not fit into the tyre at all.