Originally Posted by
williaty
26" rear wheel so I'm looking at about ~10.5 gear inches, which isn't unusually low for loaded touring in a recumbent tadpole trike. I currently have a 22T granny wit the 42T cog in back and it's nowhere near low enough.
OK, that's what I thought and I understand that a for a trike there is no such thing as too low a low gear. BTW, there are cassettes with 50 and 52T big cogs intended intended for 1X deivetrains but should work for your purposes. Your current 22T granny with a 52T cog gives the same 11 gear-inch low.