Re: [CR]T.A. "Criterium adaptor" question

(Example: Framebuilding)

Date: Mon, 7 Jul 2008 16:12:28 -0700 (PDT)
From: Jerome & Elizabeth Moos <jerrymoos@sbcglobal.net>
Subject: Re: [CR]T.A. "Criterium adaptor" question
To: PBridge130@aol.com, classicrendezvous@bikelist.org
In-Reply-To: <d6b.2aa4d3cc.35a3de9d@aol.com>


If I understand it correctly, and with TA there were so many product variations I would never bet on it, the Criterium adaptor is just the opposite. I have a couple of what I believe are Criterium adaptors, and they are rather stout pieces that bolt to the 50.4 mm BCD crankarm, then allow attachment of two criterium rims at a BCD of 151 or 152 BCD for both rings. I think the idea was to provide a spider of sorts that was much stiffter than bolting the outer ring direct to the crankarm as with Cyclotourist. This presumably was for racing use, and since the BCD of the rings is very close to the old 151 BCD Campy Record, so is the range of gears of course. Or at least the smallest ring. TA evidently made some enormous rings with more teeth than anything Camoy ever produced. I have a photo book from In The Day with a photo of the great Beryl Burton using a Criterium adapter on a Jacque Anquetil frame.

Regards,

Jerry Moos

PBridge130@aol.com wrote:

Tifosi,

Does a TA "criterium adaptor" allow the use of an second-position (inner) TA chainring in the first (outer) position? Is that the purpose of the adaptor?

If you repond on-list, could I trouble you to cc me directly?

Thanks,

Peter Bridge san diego ca usa

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