Re: [CR] GP Wilson.... tandem photo

(Example: Production Builders:Frejus)

References: <A9E2DAC25E594A409EA0E426D16ACA94@AD.UCSD.EDU> <AANLkTikbHRtOQrWFCa+0gtm-ZG3-d1UyGpOJ8+wrxu=r@mail.gmail.com>
Date: Mon, 10 Jan 2011 16:42:12 -0500
In-Reply-To:
From: <oroboyz@aol.com>
Cc: classicrendezvous@bikelist.org
Subject: Re: [CR] GP Wilson.... tandem photo


<<... One can do this to adjust the chain tension without an eccentric BB. >> Yes, you can also move the "idler" chain ring closer to one end to increase take up...BUT.It is not a good substitute for a proper eccentric bb chain tensioning set up; the differential between the chain ring sizes cannot be very large. There is tremendous drive line tension along those chains, and it tries to compress the "idler" chain ring in an aggressive way. Not pretty!

Dale Brown Greensboro, North Carolina USA

-----Original Message----- From: Jim Merz <jameshmerz@gmail.com> To: Peter Brueggeman <4peebee@peterbrueggeman.com> Cc: classicrendezvous@bikelist.org Sent: Mon, Jan 10, 2011 1:49 pm Subject: Re: [CR] GP Wilson.... tandem photo

One can do this to adjust the chain tension without an eccentric BB.

Jim Merz Big Sur CA

On Mon, Jan 10, 2011 at 10:36 AM, Peter Brueggeman < 4peebee@peterbrueggeman.com> wrote:
> In Dale's GP Wilson photos, there's a tandem photo showing an unattached
> chainring in the tandem chainline located between the captain and stoker
> chainrings. That's a new one to me. It looks like it is a couple of teeth
> larger than the front and rear chainrings.
>
> Is this something others have seen done, and does it accomplish anything
> other than looks?
>
> http://www.flickr.com/photos/oroboyz/5342088388/in/set-72157625663852275/
> ..........
> Peter Brueggeman
> La Jolla California USA
> 4peebee(at)peterbrueggeman.com