you can have both but you need a specific bash like this and it wont fit all crank/chainring combinations, only way to know for sure is to try so could be an expensive mistake (tho if you got it from CRC you could always send it back)
International Standard Chain Guide mount – three bolt holes mounted around the BB shell, that allow the bash to be fitted very securely without having to squeeze it between your driveside BB cup and frame.
I realised that I never really rode on road for more than a few miles anyway, so a triple and bash set-up seems overkill. Much prefer trimming things down to the bare essentials with something like what househusband says – 24/36/bash. If you run out of gears on the way down with that, then stick on a road cassette. If you still run out of gears on the way down, then you’re probably sponsored by Specialized, Orange or Santa Cruz 😉