[Classicrendezvous] Re: [thin-walled frame tubing)

(Example: History)

Date: Wed, 18 Oct 2000 08:44:52 -0400
From: Jerry Moos <moos@penn.com>
To: Hilary Stone <Hilary.Stone@Tesco.net>
CC: gregparker1 <GregParker1@compuserve.com>, "richard m. sachs" <richardsachs@juno.com>, classicrendezvous@bikelist.org
References: <E13lpf2-0001nD-00@aisle.tesco.net>
Subject: [Classicrendezvous] Re: [thin-walled frame tubing)

Do you know the wall thicknesses of the other current Reynolds tubesets? Did I understand someone to say that Columbus SL was 0.9/0.6/0.9? Anyone know the thickness of SLX or TSX? The Columbus site no longer lists them.

Regards,

Jerry Moos

Hilary Stone wrote:
> It must be remembered that 531SL and its successor 531 Pro had the same wall
> thickness tubing as 753R but in lower strength 531 steel alloy. 653 also
> featured the same wall thickness tubing but with slightly enhanced strength
> main tubes and 753 rear chain and seatstays. These needed to be silver
> soldered to retain their strength. I know of one small factory that had
> repeated problems with cracking chainstays on 653 frames. They were using a
> lot of heat input with brass and cold setting them big time!
> 753 makes for a very reliable frameset as long as it is carefully built
> with silver solder. Many of the other thin wall sets ­ Columbus EL for
> example are also very reliable.
> Hilary Stone
>
> >
> > Jerry Moos wrote:
> >
> >
> > Heat-treated or no, I think 753 and other thin-walled tubeset are just too
> > thin. The simple fact may be that 531 or maybe 531SL along with Columbus
> > SL represented the best compromise between lightness and durability.
>
> Greg Parker added:
> >
> > Now, I gotta say that the early 753 tubing is just so darn cool for a light
> weight
> > spinner such as myself that I find it just about perfect for many rides. I
> > did admit
> > in an earlier post that I agree with the conventional wisdom of the early
> > 80's that felt
> > that 753 was right at the edge of usability given the metallurgy and
> > tubing diameters of
> > that period. I certainly have a subjective opinion here, as my 1979
> > Raleigh Team Pro 753
> > has served me well for 20+ years and thousands and thousands of miles.