Profiles' 145mm crank arms

With reference to the latter part of this statement. You are quite right that maybe the shorter cranks just weren't for me but may work for others.

However, as the OP has a similar issue with knee pain I thought it pertinent to join in this discussion. I am in no way saying that he shouldn't try it, but 145mm is a hell of a drop from the crank length that most people would use and my personal experience would recommend against it.

fair points and you speak from experience, although you may have different symptoms. The problem is it can turn out quite costly to try I suppose (purchase of cranks arms and sprocket/chainring).

In my experience I prefer 165 over longer so who's to say I wouldn't like 155s. As I have just installed some 165mm BMX cranks this morning I guess I had better stay with those for a while :-)