Something is creaking on my Cannondale while pedaling with force. It is easier to hear in low gears, when climbing. An audio clip tells it better than any literal description, so here is a recording of me climbing a steep slope: Recording You can hear it starting from second 7. I held my phone over the crankset.
If it matters, I run Shimano 2×11, FSA MegaExo BB, DT Swiss 350 rear hub. Drivetrain elements such as chain,chainrings,cogs, pulleys are thoroughly cleaned to look and work as new. Some months ago I cleaned and lubed the BB, chainring bolts and pedal threads. The creaking is also happening while standing, so it’s not seatpost related. Yesterday I also lubricated the rear wheel nipples(WD40) and also placed a drop of lube on the contact points between the spokes, with no results. Any ideas ?