alcjphil

This is a useful comment. Shifting with a compact that has a 16 tooth difference between chainrings is quite different from an older triple that has only an 8 tooth difference between the big and middle rings. Even a traditional 53-39 setup has a 14 tooth difference and usually requires a rear change along with a front shift to avoid that abrupt change in cadence you have been experiencing. With the 13-26 cassette I have on my bike I have to do a double or even triple rear shift when I drop from large to small ring with my 52-36 semi compact double crank. I have a 12-29 cassette on my other bike with a 50-34 compact and I have to do a double rear shift when going from large to small ring. Basically, you have to learn to do 2 things at once. With a bit of practice it becomes second nature.