Artemisia wrote:
> That's interesting. Is it easy to swap around like that? I know Roos has
> the privilege of living with a seasoned bike expert, and perhaps is one
> herself
She's pretty much as competent as me, and while you may have me as a
"seasoned bike expert" that doesn't make me a great mechanic by any
stretch of the imagination! Nevertheless, it's pretty straightforward
by our fairly, but not spectacularly, low standards.
You unhook the chain from the chainwheel, undo the bolts holding the
chainwheel onto the crank, remove it, put the new one in place and
replace the bolts. If there's a chain protector disc you'll probably
have to take that off and put it back on too, but again it's just a case
of turning bolts.
> Does not the
> chain need shortening or lengthening when you change the spec on the
> chainring?
Potentially: to some extent the chain tensioner at the back will take up
the slack, but you may put it over its limits, depending on the size of
the step. It's easy enough to find out empirically: if your gears start
giving trouble, especially the higher ones, you'll probably need to
shorten the chain a little. That's quite easy with a chain tool. If
you get one, ask at the shop whether they have a spare bit of old chain
to practise on. I use one of Park's "foolproof" ones, and I haven't
managed to bugger it up yet, despite only using it once a blue moon. If
it's a bit scary then /any/ bike shop should be able to do the job for
you in minutes, if not seconds.
Pete.
--
Peter Clinch Medical Physics IT Officer
Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital
Fax 44 1382 640177 Dundee DD1 9SY Scotland UK
net p.j.clinch@[EMAIL PROTECTED]
http://www.dundee.ac.uk/~pjclinch/
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