in message <[email hidden]>, Paul
Boyd (') said:Tony Raven said the following on 03/10/2006 12:47:
Quoted message said:ProGold is good stuff but sloshing it all over the chain is a waste -
you can drip it onto the edge of the rollers so it wicks inside to where
it is needed.
I do the latter after doing the former, and yes, the former probably is
a bit of a waste.
Quoted message said:Putting it on a dirty or dusty chain is also a bad idea:
it just washes the dirt from the outside where its harmless to the
inside where it does all the damage.
Possibly, but wouldn't that apply to any lube/cleaner? Certainly with
the white spirit wash, an awful lot of gunk comes out of the chain, but
what I haven't done is to put a visibly clean chain into white spirit,
and then see how much dirt comes out.
OK, this is complex and a lot of people have views on it. My practice is
close to (and partially influenced by) Sheldon Brown's
Firstly, the lube that's applied to the chain in the factory is the best
thing there is. It's applied under pressure and gets into all the bearings
of the chain, and as there's no solvent in there first isn't diluted or
contaminated with anything. You can never get back to as good as this, so
attempting to clean off the factory lube is madness.
Secondly, applying lube to a dirty chain is bad news because as Tony says
it tends to carry contaminants into the bearing surfaces. If you want to
relube a chain without going through a full clean-and-relube cycle then
run the chain through a handfull of kitchen paper first until you could
eat your dinner off it - then relube. I do this quite often on road bike
chains, which tend to be pretty clean anyway, but never on a mountain bike
chain.
Thirdly, applying solvent to a chain and not washing it out or allowing it
to evaporate off is bad news because it will partly dissolve and thus
reduce the effectiveness of the new lube you put on.
Fourthly, any lube designed to be put on cold contains solvents to help
carry it into the bearing surfaces, and is thus less effective than the
original lube. So, like thermodynamics, you can't win and you can't break
even. Systems where you put the chain into wax, heat it to melt the wax
and drive the air out of the bearings and then cool it in the wax to suck
melted wax into the bearings may well be more effective but it's a big
faff and I've never done it.
Fifthly, if you don't clean the outside of the chain meticulously after
relubing it will attract dirt, so you'll very soon have the whole job to
do over again.
So the full job is:
(1) take the chain off the bike;
(2) put the chain into wide mouth plastic bottle, add about a cupful of
solvent, screw on the top of the bottle, shake vigorously for two or three
minutes;
(3) pour solvent off into a container in which the dirt can settle out.
After a day or two you'll be able to pour off the nearly-clean solvent,
and you can reuse it quite a number of times;
(4) hang chain up to dry for at least an hour, ideally overnight;
(5) apply lube to each link (many people say one side only and while I see
the logic I find this difficult to do in practice);
(6) hang chain up to allow lube to penetrate into the links for at least an
hour, ideally overnight;
(7) clean the outside of the chain thoroughly with an old rag or kitchen
paper;
(8) put the chain back on the bike.
For me, this is an every serious mountain bike chore, but it's once a month
or less for my good road bike. My winter bike has been running on a
transmission I was deliberately running into the ground over the past
year, so it's had little attention; but now it's on an all-new
transmission it will probably need a proper chain clean once a week
through the winter. It's a faff. But a well cared for chain lasts a lot
longer and does less damage to the rest of the transmission.
I use White Lightning on my good road bike chain, Finish Line Cross Country
on my winter bike and my mountain bikes. White Lightning is very clean,
but doesn't survive rain so it's not suitable for utility bikes. Both
products are expensive but you use very little so they aren't actually
expensive in use. I tried White Lightning Epic as a winter bike lube but
wasn't impressed.
--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/
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