It's our best selling inner tube- the Schwalbe AV4 with Schrader valve
Historically it fitted all Brompton folding bikes - until the advent of the T Line and then P Line which sometimes use a Presta / racing type valve and the G Line which uses a 20 inch tube
As part of the Schwalbe re-branding the box has now been updated - we think it's still the best tube you can get for your Brompton folding bike!