Re: [CR]Straight post clamps now old position

(Example: Production Builders)

Date: Mon, 18 Dec 2000 08:36:52 -0800
To: Sheldon Brown <CaptBike@sheldonbrown.com>, Jerry & Liz Moos <moos@penn.com>, Classic Rendezvous <classicrendezvous@bikelist.org>
From: "Joseph Bender-Zanoni" <jfbender@umich.edu>
Subject: Re: [CR]Straight post clamps now old position
In-Reply-To: <v04210101b6632e069d79@[10.0.1.3]>
References: <3A3CF145.1A14DC9E@penn.com>


Sheldon said:
>A more interesting question to me is whether the bolt should go in
>front of or behind the seatpost. For any modern ideas of fitting,
>the bolt needs to go behind the post, but if you look at old
>illustrations, the saddles were very commonly placed much farther
>forward, with the bolt in front of the seatpost, or even cantilevered
>forward on a "7" shaped seatpost with a forward-facing horizontal
>extension.
> I have pondered this too and generally the very relaxed seat angles on early bikes result in fairly normal positions with the forward facing clamp. I would call normal a plumb line down from the front of the seat is 2-3" behind the BB. My Pop Brennan 6 day bike gives exactly the same position and weight balance as a modern bike. I think I could say the same about my circa 1928 BSA path racer. My 1898 Sterling, which is a roadster, has a cramped top tube by modern definition, even with a 44" wheelbase.

The old six day guys around Newark used to look disapprovingly at bikes where the seat wasn't far enough back relative to the BB. They felt there was a sweet spot for spinning with power. They were very concerned with fit and weight balance on the bike. The "7" shaped seatpost and a Major Taylor stem makes the bike quite adjustable.

Joe Bender-Zanoni
3 degrees and more snow tonight in Ann Arbor