Jorg Lueke wrote:
> On Apr 30, 8:34 am, "Bill Sornson" <[email protected]> wrote:
>> Jorg Lueke wrote:
>>> I definitely hear a loud clang when riding over rougher spots on
>>> shoddy pavement. It sounds like it comes from right underneath me.
>>> Would that be the stem bouncing a bit against the frame or some
>>> other cause. It doesn't seem like it's coming chain.
>>
>> It probably IS the chain, clanking off the chain stay. Other
>> culprits include your saddle bag, cleat/pedal noise (if
>> unweighting), cyclometer slightly loose in bracket, cables hitting
>> the frame, etc. etc. etc.
>>
>> It's the chain. 
>
>
> I suppose that is easy enough to fix then. So I shoul stop being lazy
> and put in a chain guard. THEN if I still here it move on to the next
> set of causes.
Nah, a chain guard will likely be louder!
Bounce the bike on your garage floor or driveway and listen for the clang.
Look carefully and do it again. Chains move/bounce around for a reason, of
course, but if it's way too slack you should take a link (or even two) out.
You might need a shop to help with this if you don't have a chain tool; have
them show you how to use one.
If it's not the chain, then you want to rule out anything mechanical like a
loose headset or bolt or front derailleur cage; like I said it could just be
your saddle bag bouncing around if you have one.
Let us know what you find!
Bill S.
