Schwalbe 20 Inch Tube for Wheel Chairs 7B

20 inch inner tube with different types of valves. Especially suited for wheel chairs. 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:
23-451 (20 x 0,90)
25-451 (20 x 1,00)

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