The air chamber 20" of the OnBike is an air chamber for child's bicycle with tires 20 x 1.50 - 1.75 universal valve 500 A40 - 47 - 406.

Formed by a circular tube-continuous very elastic which allows it to expand at the time of entry of the air, so as to bring pressure to the tire in which it is inserted, and a valve Italy - Queen with a special locking system that allows for inflation.

This air chamber is specially designed for tires 20".
The air chamber 20" is universal for the cycles from 15mm to 17.5 mm.

Measurement: 20" x 1.75-2.10
MTB - BMX
Valve Italy Queen 28 mm
ETRTO 47-406