I had been running 52-39-28 on our Campy Athena 11-speed triple (Lightning crank) with the largest Campy cassette, 12-29.
But with the advent 11-speed Shimano and SRAM, Campy and Shimano cassettes are interchangeable. So, we changed the freewheel on our DT Swiss hubs from Campy to Shimano, and put on a Shimano Ultegra 11-32 cassette.
With the range coming from the cassette, this allowed reverting to Athena spec 52-39-30 chainrings (Ultegra triple). Now the Athena FD shifts fine (since we added the FSA tandem FD clamp).
We've done some of the steep climbs with which our terrain abounds, and both us agree that the 30t granny 32t cassette seems soooo much easier than the 28t granny 29t cassette.
But when I made the graphic in Gear-Calculator, they hardly vary in ratio. For 11-32 (top) and 12-29 (bottom), the ratio is 0.94 and 0.97 respectively.
Can we really notice a ratio improvement of 0.03? Or are we just fooling ourselves?