Tinkling in lowest rear gear
FeynmanC
Posts: 649
When i use the lowest gear on the rear chainset I get this "tinkling" sound, but only when i'm on the seat and peddling.
It's not something I've been able to replicate off the bike.
Is it possible that my weight (12st) is bowing the spokes just enough to catch something on the rear gearing mechanism? It doesn't look like there's anything close enough to the spokes but it's the only thing i can think of.
It's doing my nut in and i'm actively avoiding using that gear, even when going up big gradients (i'm getting better at the hills as a result, but i want the noise gone too).
It's not something I've been able to replicate off the bike.
Is it possible that my weight (12st) is bowing the spokes just enough to catch something on the rear gearing mechanism? It doesn't look like there's anything close enough to the spokes but it's the only thing i can think of.
It's doing my nut in and i'm actively avoiding using that gear, even when going up big gradients (i'm getting better at the hills as a result, but i want the noise gone too).
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Which cog are you using at the front at the time?Cycling weakly0
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Is it possibly the end of the gear cable impinging on the spokes?0
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It's likely to be the chain rubbing on the sides of the cages on the front mech, normally out of reach but as the frame flexes with you out the saddle it can happen.<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Tartanyak</i>
Dude, did you trace that, from a distance off a diagram drawn by a blind man using his feet from the description given to him by someone that could only use English quotes from the movie of \'Grease\'?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">0 -
Could be a number of things:
The rear mech cage touching the spokes - check the rear mech stop screws or that the rear mech frame hanger isn't bent. I doubt the spokes are bowing.
The chain rubbing on the front mech or the side plates of the rear mech cage - could be a protruding chain pin or misalignment somewhere else.Make mine an Italian, with Campagnolo on the side..0 -
cant imagine 12st deforming anything enough to cause strange sounds... Im 17st and my bike takes my girth like a trooper!
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yoadius wrote:It's likely to be the chain rubbing on the sides of the cages on the front mech, normally out of reach but as the frame flexes with you out the saddle it can happen.
It seems to be worse when i'm in the saddle - with more weight over the back wheel.
And I know that noise, it does it a little when I go to the highest gear on the cassette sometimes, unless I trim the front derailure. That's more of a clattering noise, this is a spokey type tinkle, but thanks for the help0 -
Monty Dog wrote:Could be a number of things:
The rear mech cage touching the spokes - check the rear mech stop screws or that the rear mech frame hanger isn't bent. I doubt the spokes are bowing.
The chain rubbing on the front mech or the side plates of the rear mech cage - could be a protruding chain pin or misalignment somewhere else.
When the bike is upside down I can't replicate the problem. It's only when there's weight on the wheel, but i'd tried hand cranking and pressing the rear mech in towards the spokes and it does catch a few, but the sound is different - a lower pitch - plus I have to really press it in, so hard it's almost taking the chain off the into the spokes too. My guess is that it's got to be something in that area.
I think i'll have to take it to the LBS and get one of them to take it round the block - it does the noise every time i go into the gear so they should hear it straight away.
Thanks all for your suggestions and assistance.
If it gets resolved i'll be sure to let you know what it was.0 -
If it was something rubbing the spokes you could spot for some marks or wear on them?
Im guessing its just a slight tweak to your indexing thats needed, somehow the weight burden might be enough to highlight the noise.0 -
I've an idea what the "tinkling" sound may be...
Cycling weakly0 -
It's back from the bike shop.
All the spokes on the non-cassette side were loose and have been tightened up the wheel realigned. They say it wasn't anything catching on the rear mech though.
The front wheel has also been tightened and realigned, but they have found a flat spot on the rim, probably caused by a pothole.
I gave it a quick spin around the car park at work and it seems the tinkling has stopped, but i'll have to wait til tomorrow to give it a proper go.0 -
so do mine.it drives me nuts.I thought it was the spokes stretching or loosening but it still going on after ages and ages.any clues?0
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It was loose spokes, they deformed just enough to catch the rear mech, especially when I was putting down some power in lowest gear and "leaning" the bike as i pedalled.
The LBS had it in a few times with no effect (i dont think they even tried to solve it, as it didnt show up except in particular situations and not on a workshop stand) and when it broke a spoke they replaced it, had to tighten and retrue the whole wheel...problem solved!
Hope that helps.0 -
I thought this was a thread about going for a wee without getting off your bike. Gutted.0
