This masterwork is the single greatest source of information on derailleurs that the world has ever seen (and, quite probably, ever will see).

Frank Berto towers over the subject like a colossus, but mention should also be made of his esteemed contributors; Ron Shepherd, Raymond Henry, Walter Ulreich, Tony Hadland and Gordon Selby.

It’s the bible.

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• Publisher: Frank Berto
• Country: USA
• Date: First published 2000, this edition 2006
• Derailleur brands: too numerous to even think about listing...
• Derailleurs: too numerous to even think about listing...