FISCHER bicycle inner tube 20 inch, black, Dutch valve, 35 mm valve length

This quality tube from FISCHER fits your 20 inch bike perfectly thanks to its wide ETRTO compatibility.⁠‌‌‌‍‌‌‌‌‍‌‍‍‌‌‌‍‌‌‍‌‍‌‌‌‍‍‍‍‌‌‌‍‌‌‍‍‍‌‌‍⁠ The Dutch valve with a 35 mm length ensures reliable inflation and long-lasting performance.⁠‌‌‌‍‌‌‌‌‍‌‍‍‌‌‌‍‌‌‍‌‍‌‌‌‍‍‍‍‌‌‌‍‌‌‍‍‍‌‌‍⁠

When do you need a new inner tube?
You replace a bicycle inner tube when you have a puncture that can no longer be repaired, or as a preventive measure when replacing your outer tyre. This FISCHER inner tube has been specially developed for 20 inch wheels and fits a range of tyre widths, from narrow 1.5 inch to wider 2.125 inch versions.

Why choose this size and valve type?
This inner tube is suitable for 20 inch wheels according to the ETRTO standards 40-406 to 57-406, meaning it fits a wide range of tyre sizes. The Dutch valve is the standard in the Netherlands and makes inflating easy with any regular bicycle pump. The 35 mm valve length ensures the valve protrudes properly through the rim, even with slightly deeper rims.

Wide version for extra strength
The wide version of this inner tube offers more material and therefore a more robust construction. This means the tube is better able to withstand small sharp objects and is less likely to puncture. The extra width also distributes the pressure more evenly across the surface, which benefits comfort.

Checking practical compatibility
Always check the ETRTO code on your current outer tyre before purchasing - this is printed on the side as three digits followed by a dash and three more digits. If your code falls between 40-406 and 57-406, this inner tube will fit perfectly. Also make sure your rim is suitable for Dutch valves and that the 35 mm valve length is sufficient for your rim depth.