BB loose or something else?

HixX

My derailieurs seem to be set up fine with no noise throughout the range, but I notice when having to really "drive" uphill using the granny cogs, it sound like they need adjusting - you know the clicking type noise when the dr is pushing on the chain. My thinking is that its the bb or crankset loose as it wouldnt be the crankset flexing would it (XT)?? I've only done about 50 miles on it, with only 15 or so off road and it "seems" like all is nice and tight, would I be expecting any problems this soon?

supersonic

Do the cranks turn smoothly by hand, not stiff or any play? Drivetrains under pressure will sound different from in the stand. Which gear combo are you using?