On two of my bikes I'm running subcompact 46-30 and 10 speed cassette of 11-34 with Ultegra STI. Gives me actually a lower low than my old standard road triple of 52-42-30 and 11-30 cassette without the fuss of a triple up front. Love it. But as noted above, not a whole lot new there in that we were using only two of the standard 3 chainring mountain crank before that. Btw, nice bike OP !