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 Post subject: That little hole
PostPosted: Thu Aug 09, 2012 6:15 pm 
retrobike rider
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Location: In the village
'scuses for being an ignoramus but why do racing frames have that little hole on the rear dropout.

Love Bugloss.


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 Post subject:
PostPosted: Thu Aug 09, 2012 6:25 pm 
rBoTM Winner
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You'll notice on close inspection its a threaded hole, thats if its not rusted to death!

Rear drop-out adjusters go in them so you can set your wheel up accurately :wink:

http://www.velobase.com/ViewFramePart.a ... &AbsPos=49


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PostPosted: Thu Aug 09, 2012 7:11 pm 
retrobike rider
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Thanks for that Ian but it was this little hole that I was interested in.


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 Post subject:
PostPosted: Thu Aug 09, 2012 7:15 pm 
Old School Grand Master
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Portecena (spelling)...... chain hanging device for when the rear wheel is out :)

Shaun


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 Post subject:
PostPosted: Thu Aug 09, 2012 7:20 pm 
retrobike rider
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Wow, Posh!
Don't have a picture do you?
Or is it just a type of rusty nail poked through the hole?


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 Post subject:
PostPosted: Thu Aug 09, 2012 7:23 pm 
Old School Grand Master
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http://campagnolo.wikispaces.com/Portacatena

Shaun

Plenty on google pics


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 Post subject:
PostPosted: Thu Aug 09, 2012 7:37 pm 
retrobike rider
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Well thanks, that clears that up.
I'm sure there'll be more questions like that soon.


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 Post subject:
PostPosted: Thu Aug 09, 2012 7:50 pm 
rBoTM Winner
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Well bugger me thats a new one on me! My last device for holding the chain in place without the wheel fitted was a bare hub !


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 Post subject:
PostPosted: Thu Aug 09, 2012 8:07 pm 
Road Moderator
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Ian Raleigh wrote:
Well bugger me thats a new one on me!


And me!

Enter (we are not worthy) emoticon here :D


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 Post subject:
PostPosted: Thu Aug 09, 2012 8:12 pm 
rBoTM Winner
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After reading the link Shaun put up i now understand what that 'thing' is for :shock:

The Portacatena was introduced at the '77 Milan show, and made it's first catalog appearance in 1979.
Used with a version of Campagnolo's 1010B dropout taped with two screw holes, the portacatena consisted
of an aluminum rail that attaches to the inside of the dropout, and a special rear shift lever. The idea is for you
to replace your 6 speed cassette with a 5, the aluminum rail attached to the inside of the dropout takes the place of
the 6th cog. In the advent of a puncture you shift over to thee rail which should hold the chain out of the way and
make for speedy wheel removal. When I install my portacatena, I'll add more detailed photos of it on the bike and in
action as well as a better description of it's function.


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