rattling bike

M said:

I bought a Bianchi boardwalk couple weeks ago. I have noticed on the higher
gears, 7 and 8, there's a rattling noise that seems to be coming from the
chains. This problem has existed since I bought the bike.

Is this a common problem and easily fixable?

Assuming that by "higher", you mean "smaller diameter in the rear"...

Does it happen only when the front derailleur is set to run on the
smaller chainrings? If so, the chain is probably hitting the front
derailleur's cage. If the adjustments are not off by enough to cause
shifting problems, I'd say that the best solution is to shift up to
the large chainring and select a lower rear cog. Your chain will last
longer, and it probably won't hit the cage.

If it happens in all front chainring combinations, the first thing I'd
check is shifter adjustment for the rear der, and the cable routing;
if the cable is binding, it can cause the shifting to be off by a bit
at one end of the range, and that can show up as a noise that might
sound like a rattle to the non-technical ear..
--
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M said:

I bought a Bianchi boardwalk couple weeks ago. I have noticed on the higher
gears, 7 and 8, there's a rattling noise that seems to be coming from the
chains. This problem has existed since I bought the bike.

Is this a common problem and easily fixable?

Some of that is inherent to today's very small high gear
sprockets.

That being said, ask your dealer to ensure the rear changer
is straight and see that there is some lubricant on the chain.

New bike assembly today seems to be available only on an ad
hoc basis - to complaining customers after the sale in some
cases.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971