Thanks for asking
I was needing to know the same thing.Drone 5200 said:What's the difference between "maximum sprocket" and "total capacity" for a derailleur?
Shimano's website says the RD-7700 and RD-7800 have a max sprocket of 27T and a total capacity of 29T. While the RD-7703 has a max sprocket of 27T and a total capacity of 38T.
What is "total capacity"?