Re: Horizontal aluminium dropouts.

in message <LIwPh.188$r4.123@xxxxxxxxxxxxxxxxxxxx>, Ambrose Nankivell
('firstname+'n'@gmail.com') wrote:

Unaccustomed as I am to starting threads on this newsgroup, I have an
issue that I'd like to solve.

My main steed is a town bike made around a remotely absurd oversized
aluminium frame, with a nexus seven speed hub gear, and nutted axles.

Because of my manly powerful legs, or maybe the size of sprocket I have,
I find I often have problems with the axle moving forward in the
dropouts under acceleration, or gradually edging forward, so, either
way, the chain becomes less taut.

Whenever I am assaulted by the p+nct+re fairy, I always retighten the
wheel nuts as hard as I can with the 20-odd cm spanner I use for the
job, and indeed, over time, I have probably overtightened it, as the
aluminium has been indented with the shape of the wheelnuts, and gouged
out where the axle has pulled forward on the drive side. I also am sure
that I line up the axle as close to perpendicular to the dropouts as I
can manage before tightening, and I check halfway through.

What you want are 'chain tugs' - banjo shaped clips which have a bolt part
running through a cap which fits over the open end of your track-ends. You
fit the washer bit over your axle before the nut, then you slip the bolt
part through the cap, sit the cap on the track-end, tighten up the nut of
the chain-tug until the chain is acceptably tight, and then tighten the
axle nuts.

Browsing around on the Web I can't find any of these generic chain tugs,
but On-One sell some rather fancy ones:

http://www.on-one.co.uk/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=13&MMN_position=35:35

--
simon@xxxxxxxxxxxxxx (Simon Brooke) http://www.jasmine.org.uk/~simon/
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