I have a creak that only happens when I really hammer/stand on pedals when climbing. The sound seems to happen with every rotation of the crank. Seems to creak a bit more when my left leg pushes down. This isn't coming from the seat/handle bar area.
So here's what I did try to prevent this creak:
-re-cabled my bike
-every bolt cleaned, re-lubed
-removed cranks/bb, re-lubed splines on octalink BB, lots of anti seize on BB threads. BB torqued to 50 ft lbs, cranks to 40 ft lbs. This is a sealed BB, no adjustment.
-pedals removed, cleaned re-greased threads, not loose on crank
-checked cleats for looseness, lubed cleat mounting bolts
-re-lubed seat post, alumin/alumin contact
-checked tension on wheels, all spokes within 5% of each other
-tried 3 cassettes
-rebuild hubs. No binding, spin smooth.
When the creak started I started to diagnose, which lead to a worn chain. I had a dura ace chain. I replaced it with Sram 991HP chain. I looked on sheldon's site at worn ring/cassette pictures. I don't seem to exhibit signs of wear.
After doing all the above, the sound has gotten less profound. Before I found the chain issue, I thought it was my BB. I took it out, cleaned, re-torqued. If I remember correctly, the creak did decrease a bit. Is this BB related? It seems to spin smooth. Any ideas?