Air chamber schrader valve 20 1.75/2.25

A linear (straight, open, as opposed to circular) air chamber that does not require the wheel to be removed for installation. The two ends overlap to form a circle that fits the rim. Thus this tube, depending on the length of the overlap, is suitable for all wheel sizes: 20", 24", 26", 27.5", 29", 650 or 700. Very practical especially for electric bikes, Dutch bikes and all cases of difficult wheel removal. Threaded valve (Schrader/Presta) with a tightening nut at its base, makes the chamber much more resistant by avoiding any movement of the valve during braking. Eliminates the associated risk of puncture by cutting the chamber near the valve.