BBB BTI-21 20"x 1.75/2.125" tube
Inner tube for a children's bicycle with a wheel size of 20".
Made of high-quality butyl rubber with different types of valves.
FV- ball valve 33 mm
AV - auto valve 33 mm
DV - Dunlop folding 31 mm
| Valve | Schrader valve, Dunlop valve |
| Tube material | Butyl (synthetic rubber) |
| product ID | 23342 |
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