How To Choose A Rear Derailleur

You need a new derailleur, but the specs are confusing. How do you pick the right one? We're here to help you make the right choice. This video demystifies the four key specs that tell you if a derailleur is compatible with the shifters and cassette you already have. Chapters 00:00 Start 00:07 Overview 00:30 Number of Gears 00:53 Cassette Capacity 01:36 Crankset Capacity 02:02 Total Capacity 03:25 Shifter Compatibility 05:28 Summary