Schwalbe 20 Inch Tube 7A

20 inch inner tube with different types of valves. Extreme air pressure stable! The rubber compound makes it possible: less air leakage and less to pump. Extremely reliable! Quality control for safe riding pleasure: each Schwalbe tube is checked twice on air retention in the factory.

Fits the following dimensions:
37-438 (20 x 1 3/8)
28-440 (500x28A)
37-440 (500x35A)
28-451 (20 x 1 1/8)
37-451 (20 x 1 3/8)

In general valves can be separated into three different groups:
Presta valve: Sclaverand valve, Race valve, French valve,
Dunlop valve: Wood, Bicycle or Dutch valve
Schrader valve: Standard, Car or Moto valve