Originally Posted by
FBinNY
I For my part, I'd rather keep the tighter steps of a smaller cassette, and use a granny to get low down where I want it, but that's me.
+1 I have triples on all of my bikes as they give me the really low gears I sometimes need without leaving huge gaps in the cassette gearing. The extreme example of these gaps is the current fashion for 1X drivetrains with a single chainring and a 10 or 11-speed super wide range cassette like 11x36 or even 11x44. The enormous interior gearing steps in these cassettes would drive me nuts on a road bike.
As to tripilizers, the only disadvantage to the current Shimano's is they have a BCD that limits the granny ring to 30T.