Hi, I have a 2015 Wilier zero 9 that I have had for about 3 months - about 2500KM on it so far. It recently started clicking when climbing a significant grade - > 8% or so, and riding out of the saddle. It started out as only at the bottom of the left pedal stroke.

So .. I took it in to the LBS where I bought it and they removed BB regreased the bearings and cups and reassembled. Next ride same deal but now seems to be happening on both strokes. The sound is not super loud so I don't hear it unless I am on a slow climb since the wind noise may be masking it at a normal cadence - plus the force applied is much less on a normal cadence that these climbs.

Any idea where the sound may be coming from and how to fix it?

Cheers,
Larry