I have a 2008 Trek 1.2 size 58 cm with the triple chain ring. When I am out of the saddle and hammering a hard climb, I get this loud creaking noise that happens only when my left foot is at the bottom of the stroke- in other words when all my weight is on the left side of the bike. The noise sounds like it is coming somewhere below or behind me, but hard to tell for sure and it does seem to happen more when I am in the lower (larger diameter) gears in the back when there would be more torque applied to the rear wheel. I am not able to duplicate the noise on the trainer because I have got to really be jamming hard. So I'm hesitant to take it into the LBS only to have the dreaded "could not duplicate" outcome. Anyway, this is what I have tried to trouble shoot this noise:
-Made sure aheadset is snug and tight
-Lubed and tightened all water bottle cage and spare pump connections
-Lubed all the points where the spokes over lap each other
-Checked brake pad clearance
-Checked cleat-pedal fit
-Checked derailleur and drive train clearances and adjustments
-Tightened both front and rear skewers
-Made sure seat post was tight
So what am I missing??
When I first got the bike, there was a clunking noise coming from the bottom bracket during all pedaling. I took it back to the LBS and the mechanic said the bottom bracket nut needed tightened- wasn't tightened properly at the factory. Anyway, I'm not too familiar with bottom bracket mechanisms, but the BB does seem to be snug and is free of all other noise so I don't know if that is just a coincidence or part of the problem now.
Could this noise be from the crappy stock wheels that came with my 1.2? Or could this just be normal noise from the frame flexing? I do notice that if I apply enough pressure to the rims with my hands, they do make some noise. Just not sure if its the same noise that I am hearing when all my 220 pounds comes crashing down on the left pedal.