Originally Posted by Mongol_Waaijer
After a 1.5 year wait to succesfully remove a severed carbon seatpost from the frame I have recently recomissioned by "old" Trek Madone 5.2 (despite a healthy aversion to all things Trek).
I have Dura Ace levers, shifters and chainset, but run a SRAM 10 speed chain and SRAM cassette on it, as I prefer SRAM chains.
Since its rebirth there is an annoying rattling noise emerging from the rear of the bike whenever i ride over pave, bumpy roads etc that I cannot identify. If I lift the rear wheel a few cm off the ground and "bounce" it I hear the noise also.
My only theory is that perhaps I cut the last chain too long and it is rattling - maybe against the sides of the front derailleur?
Any ideas what else it might be?
The list of possibilities is long...these are just some that I have witnessed:
Could be a long chain but more likely hitting the chainstay than sides of the front derailleur.
Bit of cra* in the seat tube that's rattling around on top of the BB? (How did you remove the old seatpost? could something have broken off it?)
Or how about your rear wheel, is there play in the bearings? (either worn/poor tolerance sealed bearings, or cup/cone bearings that need to be regreased & tightened)
Play in the freehub (not properly attached to hub, or bearings worn out)?
Cassette locknut properly tight (the separate sections of the cassette can rattle against each other)?
Quick release done up properly? (woman on our group ride a couple of weeks ago had a nasty rattle from her front wheel when hitting bumps, stopped to investigate and it was only the lawyer tabs holding the wheel in as the QR was completely open - glad she was hanging on at the back of the bunch as it could have been messy at 50kmh with traffic around)
Tube of glue rattling round in your patch kit box?
Broken seat stay/chain stay?