Strange Sound when peddling

[madguern]

Hi all

Brand new bike Allez Sport, noticed when in lower gears especially on the smaller front cog (Compact Double) When peddling hard I hear a clunk sound (best way of describing it) When freewheeling no sound and when peddling slowly cannot hear it.

When on larger front cog can still hear it but very faint ! Driving me nuts but want to check nothing daft before I take back to shop.

Cheers

 

[fossyant]

If you are not confident, then back to the shop. Could be a pedal, BB shell, crank, chain ring bolts....

Not got any computer sensors fouling ? Not your heals catching ? Also possibly some front mech rub ?

 

[BigSteev]

Is it at a particular point in the rotation of the cranks?

 

[mickle]

Hi all

Brand new bike Allez Sport, noticed when in lower gears especially on the smaller front cog (Compact Double) When peddling hard I hear a clunk sound (best way of describing it) When freewheeling no sound and when peddling slowly cannot hear it.

When on larger front cog can still hear it but very faint ! Driving me nuts but want to check nothing daft before I take back to shop.

Cheers

Simply return it to the shop. Front mech cable stretch. It's covered by warranty.

 

[redjedi]

Simply return it to the shop. Front mech cable stretch. It's covered by warranty.

+1

How long have you had it? If it's just few weeks then it will probably be cable stretch on the front mech, especially if you use it a lot.

 

[madguern]

Cheers, took off all the computer gear to ensure no problem. Carefully watched my pedal action as well. No particular timing , I did think a stiff chain link but yesterday my theory proved wrong as was clunk, clunk , clunk then clunk-clunk, clunk, clunk-clunk ... (Very difficult to type sounds)

Probably front mech cable so back to the shop

 

[fossyant]

Easy check...are pedals tight to crank, are chain ring bolts done up.

The rest takes a bit more knowledge.....and tools !

 

[bad boy]

I think you will end up driving yourself mad with this I wouldnt bother just take it back mate.

You can always ask them what was wrong etc when you get it back. I had a very similar thing on my bike last year and it turned out to be the BB but do get it back to the shop

 

[betty swollocks]

This chap has some good noise elimination hints

 

[arallsopp]

This chap has some good noise elimination hints

That is an excellent site. Good find!

 

[Armegatron]

This chap has some good noise elimination hints

Thank you I think this might resolve my clicking too

 

[madguern]

well took bike back to LBS and noise still there !!! narrowed it down to bottom bracket, spokes, gears, saddle, handlebars, pedals or frame ..... or all of them together :-)

I have retighted the saddle tonight so will see if that makes a difference. The cleats are another option I am looking at. The problem is I cannot replicate sound on a stand only when I ride :-(

 

[Ivan Ardon]

My 2009 Allez developed loose spokes in the front wheel on it's first long ride. They needed a tweak to quieten things up.

 

[madguern]

Back to the shop and an hour later a marked improvement, just a normal rubbing noise left now :-) They re-adjusted the front derailleur and replaced the chain. So heres hoping it has solved the problem. On the way home it did seem better but I know from the past these things have a habit of returning !

I hate the bedding in period on a new bike !

 

[madguern]

damn its back .....