Grinding noise when sat down

k0109671

Hi there, much appreciated for any help anyone can give me on this.

So I've got a Cannondale Hardtail SL 5 2011 - about a month/half a dozen rides old.

Now what happens is I get a nasty grinding sound at the front cogs/derailleur area. The weird thing is though it only gets really bad when I'm sat down!??

When I'm out the seat you can just about hear it, but its so bad when I'm sat down i can hardly bear it. Needless to say I'm not riding much on it as I'm constantly stood up!

Im not sure how else to describe it, its a proper grinding, nasty, 'chain about to snap' type of noise but it might not be the chain at all. The gears shift without any real problem, if that helps.

I did take it to a different bike shop (my friend put it together as he works at a different shop - he's not around to look at it at the moment), and all this guy said was the perhaps i had some 'play in the lower bracket', whatever that means.

I'll try to give any more info if i can, the sound probably started in just my 2nd ride and has just got progressively worse.

Help! (and thanks!)

cooldad

Using capitals in the heading is considered rude (there is a rule somewhere) and could get your thread locked, you might consider editing it.
Bike shop probably meant bottom bracket - would grind if it was stuffed, but not after a few rides, unless it was seriously overtightened.

k0109671

Oh right, sorry, didn't know that, Thanks for the heads up.

And also the tip!

ThePriory1978

Its probably just your chain binding against the front deraillier. Check its aligned correctly and/or not mounted too low on the frame.