add to this from time to time, so
if there's anything you'd like to know, please ask
us and we'll include it for others to benefit.
a wealth of good information on setting up your parts to be
found in the packet with your owner's manual. Shimano changes
their stuff so often that they usually provide all the setup
specs in seven languages in the form of those black and white
adjustments - the great majority of gear problems not
arising from a crash are due to improper cable tension or
dirt/corrosion in the cables and housings. Most of the rest
are due to worn chains, cogs, and derailleur pulleys. None
of them are ever due to those little screws on the derailleurs.
Never touch the little screws
on the derailleurs. Really.
If you think you need to mess with those screws, we should
probably have a look at it.
used to be one of our pet peeves that so many mechanics replace
entire rear derailleurs when all that's really needed are
new pulleys. Now, with 9-speed mountain derailleurs, it's
not so uncommon to need a new derailleur. Still, for 7 and
8 speeds, $15 worth of pulleys may stave off derailleur replacement
for quite a while. Grab your rear derailleur by the cage and
pull out, away from the plane of the wheel. Do you see a lot
of slop in the parallelogram pivots? If so, replace it for
improved shifting. If not, look to see how much play there
is in the upper, guide pulley. It should slide in and out
freely about 1mm, but not twist out of a plane parallel to
that of the cassette cogs.
and tube ideas - We
fill small cuts in the tread with a drop of super glue. If
left open, they pick up grit and glass that gradually works
its way in. Any time you fix a flat, make sure there's nothing
left in the tire to cut again. If the cut is only a cord or
two, fill it and forget it. If it's bigger, up to 4mm or so,
install a permanent boot and then fill it (probably two applications
of super glue).
have found that lots of presta valve rims have an inner valve
hole just big enough to wear and cut on the tube until it
leaks around the valve. If you have one of these that we missed,
bring it in and we'll install a piece of rim tape over the
hole. You can do this yourself with anything stiff enough
not to get cut on the hole edge but thin enough not to cause
a lump. We don't like to use the brass ring on the valve because
it exacerbates the problem.