creaky sound when cranking My bike seems to all of a sudden developed a creaking sound when I pedal. It appears to be there in every gear. Bu t I noticed it appears to only happen when I put pressure on the left pedal. What could it be ?
It could be:


The pedal itself (even if it moves freely)
The other pedal
The bottom bracket
The saddle
Loose crank


Try to isolate each one of these by taking the weight off each in turn. 

I was recently convinced my saddle was creaking as it only happened when sitting down but it turned out to be the left pedal!