A few days ago I began hearing a clicking noise coming from the crankset and I can also sense a slight hitch when the right crank is at its upmost position just when it's about to go down.
The interesting thing is that it only happens when pedaling. When i have the bike on the stand I cannot reproduce this no matter how hard I pull and bend the cranks in whatever direction.
I have already taken the cranks off and on again and re-tightened them but without any change. I am afraid that it could be the bottom bracket itself. Unfortunately I don't have the tools to tighten it or take it off.
I have already checked this page, but could only so far to get the cranks checked: http://sheldonbrown.com/creaks.html#bottom
The bottom bracket is a Truvativ model.
The chainring is a Thimano model and has only one chainring (nexus hub shift in the back).
Is there anything else I could do or check for?
edit: I think I've tracked it down to be the bottom bracket. If I have the cranks at a certain position and bend them inwards, the clicking is quite noticeable even when not pedaling.