Re: [CR]Porta-catena dropouts Was: ID this Italian bike?

(Example: Framebuilders:Cecil Behringer)

Date: Sat, 09 Jun 2007 11:32:52 -0500
To: Classic Rendezvous <>
Subject: Re: [CR]Porta-catena dropouts Was: ID this Italian bike?
References: <> <> <>
In-Reply-To: <>
From: "John Thompson" <>

Chuck Schmidt wrote:
> On Jun 6, 2007, at 11:10 AM, Mark Bulgier wrote:
>> Don't know the brand, sorry. Just wanted to mention the inner face of
>> the right-rear dropout has the raised land for the porta-catena hole,
>> but it is not drilled (3rd picture down). I think that makes it later,
>> after the porta-catena fizzled and they were still using the same
>> forgings but stopped drilling them. Porta-catena debuted in '77 I
>> believe. Anyway this points to an '80s vintage, not the early-mid 70s
>> the seller estimated.
> This brings up something I've always wondered about: was there a
> possibility that when someone like an Ernesto Colnago placed a large
> order for Campagnolo dropouts that he asked for them not to be drilled
> and tapped for the Porta-catena to get a better quantity price even
> before the Porta-catena was deemed a dud?
> The reason I say this is because my Colnago Super which I believe to be
> from 1977 or 1978 has the raised land for the holes but undrilled and
> untapped. And I agree, I also believe the Porta-catena was debuted at
> the '77 Milan trade show.

I always filled the holes on the bikes I built. The dropout's already hot, and just a little dab of brass is all it takes to fill it. One (make that "two," actually) less things to weaken the dropout.

John Thompson (
Appleton WI USA