The Complete Handbook of Bicycle Derailleurs is a practical reference for professionals, businesses, and serious enthusiasts. It avoids marketing language and opinion, focusing instead on the mechanical facts, engineering specifications, and service procedures that you need to get the right part on the right bike and make it function flawlessly.

Starting with a clear explanation of how a derailleur actually works, the handbook moves through the different types and their specifications, then provides structured decision-making criteria for choosing the correct unit. Subsequent chapters cover step-by-step installation, day-to-day usage, routine maintenance, and a systematic troubleshooting guide for common failures. The latter half of the book addresses the commercial side of derailleurs, including supplier positioning and business opportunities, and closes with a look at emerging trends and the standards bodies that define them. Each chapter is written in a direct, instructional style, fitting it for use as a behind-the-counter reference or a workshop manual.