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rear-facing dropouts



 
 
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Old October 24th 18, 11:59 AM posted to rec.bicycles.tech
Emanuel Berg[_2_]
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Posts: 1,035
Default rear-facing dropouts

Today there was a gorgeous open-frame steel
bike from the 60s or 70s, with the favorite
635 tires.

The only wrench in the machinery is that it has
rear-facing dropouts, and the o-bolts to grab
the rear wheel axle to tighten the chain were
missing. If it ever had any! Or were they
always there on such bikes?

I think such, now exotic spare parts can be
difficult to find... Can you get away
without them?

I read [1] that on track bikes, also with
rear-facing dropouts, they don't have them (the
o-bolts). But I suppose people set the tension
before every race! I also read that track bikes
do not have QRs, because "threaded nuts will
hold the chain tension far longer", and that
such bikes have a more robust, 1/8in chain.
I bring this up because it seems to contradict
what was said in another thread that QR is
stronger than nuts. Obviously, people don't
race track bikes as others do commuters!
Unless I'm missing something else (I never even
saw a track bike IRL).

BTW aren't all nuts "threaded"? Except those
who participate in reality TV shows...

[1] page 188 in
@book{complete-road-bike-maintenance,
author = {Guy Andrews},
ISBN = {978 1 4081 7093 9},
publisher = {Bloomsbury},
title = {Complete Road Bike Maintenance},
year = 2013
}

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