Re: [CR] Did any company ever make quadruple-butted tubing?

(Example: Framebuilders:Dario Pegoretti)

Date: Sun, 23 Aug 2009 18:37:30 -0500
From: "John Thompson" <johndthompson@gmail.com>
Organization: The Crimson Permanent Assurance
To: <classicrendezvous@bikelist.org>
References: <676086.12261.qm@web112613.mail.gq1.yahoo.com> <75d04b480908231126x95b9e7dy29bef47173e6114e@mail.gmail.com>
In-Reply-To: <75d04b480908231126x95b9e7dy29bef47173e6114e@mail.gmail.com>
Subject: Re: [CR] Did any company ever make quadruple-butted tubing?


On 08/23/2009 01:26 PM, Kurt Sperry wrote:
> Wasn't "triple butting" just butted tubes with different specs on each
> end? And if so, what would quad butting be?

Ishiwata made "quad-butted" tubing in the mid-80s. IIRC, it went beyond triple butting by adding a new butted section where shift lever bosses were likely to be brazed.

--

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