I have always been able to set up the drivetrains on my steel road bikes to be nearly silent when the chain, cogs and chainrings are all clean and the chain is freshly lubed. This does not seem to be the case for my Flyte SRS-3 aluminum road bike. I have cleaned, adjusted and installed a top of the line PC-991 SRAM chain on my Flyte road bike. I am running Ultegra 6503 rear derailleur with an Ultegra 9 speed 12-23 cassette in the rear. In the front I have an Ultegra 6603 triple crank with a 6603 front derailleur. I try to avoid cross chain combinations but do end up running in the big ring and like the second smallest cog quite a bit which is the most creaky. The thing is, even in perfectly straight gear combinations I'm still getting some faint sideways grindy/creaky kind of noise. I'm beginning to think its nothing except the aluminum tubes in this frame picking up minute noises and amplifying them.
Could anyone share any personal experiences they might have on whether aluminum frames could possibly be responsible for exacerbating drivetrain noise? Thanks a bunch.