Horrid rattling

[deptfordmarmoset]

But I will never turn a bike upside doown(velominati).

You won't actually break the bike. And it'll pardon you because you're only trying to help it.

 

[ColinJ]

You won't actually break the bike. And it'll pardon you because you're only trying to help it.

But gravity would then be pulling things in the opposite direction to usual so the results might not be that meaningful.

 

[deptfordmarmoset]

But gravity would then be pulling things in the opposite direction to usual so the results might not be that meaningful.

30 seconds job and it might eliminate possible causes, plus you have a clear view of how the chain's running. Meanwhile, I'm trying to think what would only rattle when the bike's the right way up.

 

[Yellow Saddle]

I wonder what route is the easiest?

1) Ask the internet to respond with all the stuff that once rattled on their bikes and then eliminating them one by one (except for those which requires things the OP doesn't do such as turn the bike upside down or ride slower so he can observe).

2) Riding purposefully and observing.

Maybe this calls for a poll. In the meantime, will all sheep please respond with anecdotes of stuff, both common and obscure, that once caused a rattle on your bike.

 

[PeteXXX]

Could a friend ride alongside you and try to locate the rattle by listening to where the noise comes from?
One mention so far of chain slap. That'd be one of the possibilities.

 

[Pedalbob]

Could a friend ride alongside you and try to locate the rattle by listening to where the noise comes from?
One mention so far of chain slap. That'd be one of the possibilities.

Friends are rare for me let alone one with a bike. Chain slap is a possibility though. Thanks Friend.

 

[hennbell]

It is a Domane and it has an isospeed decoupler, that could also be a source of the irritation.

 

[Pedalbob]

It is a Domane and it has an isospeed decoupler, that could also be a source of the irritation.

Thanks. But the decoupler was tightened on first service as it was creaking.

 

[sight-pin]

I selected 50/11 gears and bounced the back end a little, the noise mine is the bottom of the chain flipping up&down, looks like the rollers in the chain rattle.
From this I'd suggest that the original grease in the chain is thinned out, Probably would have the same result if you oil to the chain i would suspect.
Not sure this could be the OP's problem though?

 

[Globalti]

Do you mean rattle or clatter? Rattle implies something loose and clatter implies a chain rubbing on a derailleur cage or not registering properly with the cog. From what you have posted it doesn't sound as if you have much of an understanding of adjusting a derailleur, which is a simple job. That adjuster where the cable meets the derailleur is the key; look for videos about it on Youtube.

 

[the snail]

does the noise stop if you stop pedalling?

 

[Ajax Bay]

Turn the 'H' limit screw on the front derailleur anti-clockwise half a turn. Without turning your bike upside down, and with the chain on the large chainring, lift the rear wheel and turn the pedals (or "ride purposefully and observe" on a quiet stretch of road downhill). Has the noise stopped in either sprocket? If it has on one but not the smallest, unscrew it one further half turn. Resolve to increase your understanding of both front and rear derailleurs.

 

[SpokeyDokey]

Thanks. But the decoupler was tightened on first service as it was creaking.

@Pedalbob

I have just returned my second Domane (ALR 5 Disc).

First one had a creaky decoupler which was not sorted despite stripping down etc plus it had a creaky bottom bracket (LBS spotted this) which also was not sorted.

They ordered me a second one and that had a strange rattle at speed - albeit from the front end. Headset was stripped/checked and no problem found. LBS mystified.

They have refunded me my money and I am now looking for another new bike.

Not a great experience re Treks for me.