Schwalbe’s standard butyl tube No. 4 for 16- and 18-inch tyres — including the 16-inch Brompton sizes — with a 40 mm car-type (AV) valve. Schwalbe says it holds air for an above-average time thanks to high material quality and an even wall.
- Fits ETRTO 37-340, 28→37-349 and 28→35-355 (16/18 inch)
- 40 mm AV (car/Schrader) valve
- 85 g butyl tube
- Above-average air retention, per Schwalbe
Available sizes
- 16-18 — EAN 4026495100007
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