Re: [CR]Ebay: Complete 753 tube set for sale


Example: Humor

Date: Mon, 08 May 2006 13:10:40 -0500
From: John Thompson <JohnThompson@new.rr.com>
Organization: The Crimson Permanent Assurance
To: Classic Rendezvous <classicrendezvous@bikelist.org>
Subject: Re: [CR]Ebay: Complete 753 tube set for sale
References: <20060508021247.4499.qmail@web52503.mail.yahoo.com>
In-Reply-To: <20060508021247.4499.qmail@web52503.mail.yahoo.com>


Don Wilson wrote:
> Ah, to sleep, perchance to dream...

I notice the seller says that "this tubeset requires cast BB and lugs" but I recall that Reynolds specifically cautioned against cast lugs with 753 tubing. I've seen "can-opener" failures with cast lugs on 753 frames because in a front end impact the stiffness of the cast lug punches it right through the down tube. Not to say you *can't* use cast lugs -- we certainly did at Trek -- but IIRC it was against Reynolds' advice.

N.B. The first 753 framesets we built at Trek used a specially-machined (in house) Ishiwata fork crown we referred to informally as the "framesaver fork" because the crown was so malleable the crown shoulders would bend on impact, rather than the frame. Later runs used a cast Tange crown that was quite stiff, but I don't recall an undue number of problems resulting from this.

--
John (john@os2.dhs.org)
Appleton WI USA