This innertube fits a number of different size tyres. Not all of the sizes this innertube fits will be printed on the innertube itself, as the space is limited. This Innertube will fit the following range of sizes 20x1.75-2.40 or 20x1.85 or 20x1.95 or 20x2.05 or 20x 2.15 or 20x2.25 or 20x2.40.