You could try contacting Schwalbe. From their website http://www.schwalbe.nl
Schwalbe Nederland b.v.
Dirk Storklaan 25
2132 PX Hoofddorp
NEDERLAND
tel +31 23 5555265
[email protected]
If you had posted this last Friday I could have measured a C.Bob at the London bike show on Saturday.
Schwalbe...