Strange noise...

redddraggon

I've just been for a ride on my new decathlon bike. However every time my right foot goes down (with force) I hear a grating noise. No noise when I put power down with my left foot, and it doesn't look/feel like the chain is slipping.

Everything is new on the bike, apart from the cassette which was used a couple of times before on my other bike.

Any ideas?

Anonymous

redddraggon wrote:

I've just been for a ride on my new decathlon bike. However every time my right foot goes down (with force) I hear a grating noise. No noise when I put power down with my left foot, and it doesn't look/feel like the chain is slipping.

Everything is new on the bike, apart from the cassette which was used a couple of times before on my other bike.

Any ideas?

Cassette not seated properly or lock ring not tightened sufficiently?

campagsarge

Maybe check that the chainring bolts are secure as well.

cougie

Sounds like you could be rubbing the chain on the front mech ? Maybe adjust it so it moves a mm or two further out from the frame ?

McBain_v1

My bikes are a symphony of weird noises, although now my knees have started joining in :oops:

redddraggon

Cassette is fitted correctly.

Chain not rubbing on front mech.

Will check the chainring bolts in the morning.

The thing is that it's happening in any gear 52+12(biggest) or 42+25(my smallest), so I don't think its a front mech problem. I think I'll just have to play with it.

Smokin Joe

Loose cleat? Might be just a coincidence the it happened with the new bike.

SteveR_100Milers

With smokey Joe - bet its your shoes. They can be noisy as hell.

redddraggon

Been for another ride....

The chainring bolts are tight. It's not the shoes, it's a metallic grating sound - not a squeaking. I changed the position of my seat and the sound went a bit quieter but it's still definitely there. I don't think it's the saddle though.

I put power down with my left foot - no sound, right foot there's a metallic grating sound which sounds a bit dodgy. I can't feel any slipping of the chain.

I'm pretty confused.

Anonymous

It always takes a dizzy bird to sort you lot out. :roll:
You've got swarf in your brake pads .Probably the left one.
Take em BOTH out and clean em or better still change em for Salmons
Clean the rims.as well.

redddraggon

sexybird wrote:

You've got swarf in your brake pads .Probably the left one.
Take em BOTH out and clean em or better still change em for Salmons
Clean the rims.as well.

I thought you were onto something when I took the brake pads off and there were large(ish) chunks of metal in them. I Cleaned all the pads and thought the problem was sorted.

Went for a ride this morning and the noise was still there!!!!

Anonymous

Have you got mudguards on this machine?
If so check that the tabs on the brackets which hold them in place are closed tight up against the plastic.

andrew_s

redddraggon wrote:

Chain not rubbing on front mech

Are you sure?
That it doesn't happen on the workstand proves nothing. It's quite easy to flex a frame enough in the power stoke to cause chain rub. That it happens on the right leg would imply that it's the outer plate rubbing. As suggested try adjusting the front mech enough the sit 0.5-1mm further out.

Lagavulin

Only right pedal only related issue I've had was on my mountain bike. It wasn't a grating noise though. Just a clicking on the downstroke of the right pedal.

I couldn't solve it but my dad found the rear mech to be loose.

redddraggon

A new development.....

Having left my cycling shoes at home I had to go back to flat pedals, and I was struggling to keep my feet on the pedals (noise was still there though) so had less concentration on my gear changing. I ended up in big front, big rear for the last mile or so of my commute.

There wasn't any noise on this combination, does this suggest an issue with the chain length?

redddraggon

redddraggon wrote:

A new development.....

Having left my cycling shoes at home I had to go back to flat pedals, and I was struggling to keep my feet on the pedals (noise was still there though) so had less concentration on my gear changing. I ended up in big front, big rear for the last mile or so of my commute.

There wasn't any noise on this combination, does this suggest an issue with the chain length?

Eventually found out what the problem was. The thread on the right crank was stripped....every time I was applying pressure with my right foot I was stripping more and more of the thread away. I found all this out 2 miles out from work, and 4miles away from home, when the right pedals started to feel wonky and then fall out, meaning I had to walk home 4 miles pushing my bike. Decathlon have promised to change the crank or give me a new bike on sunday, due to their failure to put the pedals on right.

Never trust the monkeys! If you want a job doing properly - do it yourself! (and other such sayings)

portuguese mike

If it didn't happen on largest front ring and largest rear (ie the chain line is being pulled away from the outside of the front mech) cog then it really does sound like chain rub as previously mentioned - an adjustment of just a couple of mm could make all the difference.

Failing that, if its a band on front mech take it off and give it and the frame a good clean. sometimes bits of dirt can get trapped between the band and the frame and as the frame flexes during pedally it can make quite a racket.

retract all that then - just read your last post

dennisn

redddraggon wrote:

redddraggon wrote:

A new development.....

Having left my cycling shoes at home I had to go back to flat pedals, and I was struggling to keep my feet on the pedals (noise was still there though) so had less concentration on my gear changing. I ended up in big front, big rear for the last mile or so of my commute.

There wasn't any noise on this combination, does this suggest an issue with the chain length?

Eventually found out what the problem was. The thread on the right crank was stripped....every time I was applying pressure with my right foot I was stripping more and more of the thread away. I found all this out 2 miles out from work, and 4miles away from home, when the right pedals started to feel wonky and then fall out, meaning I had to walk home 4 miles pushing my bike. Decathlon have promised to change the crank or give me a new bike on sunday, due to their failure to put the pedals on right.

Never trust the monkeys! If you want a job doing properly - do it yourself! (and other such sayings)

That's the way to be. Buy your own tools and work on your bikes yourself. It's a
whole lot cheaper and much more rewarding.

Dennis Noward

peanut

are you sure the chainset has been tightened properly ? have you tried tightening it up ? Mine squeaked for ages and I eventually found the crank bolt had loosened.