Re: [CR] Measuring bike frame angles

(Example: Framebuilding)

Date: Tue, 6 Oct 2009 20:14:28 +0200
From: "M-gineering" <info@m-gineering.nl>
Cc: <classicrendezvous@bikelist.org>
References: <COL121-W10D3471A2F437FFAF9E3A9BFCE0@phx.gbl> <4ACB7483.3050407@oxford.net> <8CC14BCC9CCC9B1-7814-10A34@webmail-m096.sysops.aol.com> <a0623092ac6f129218fc8@[66.167.48.133]>
In-Reply-To:
Subject: Re: [CR] Measuring bike frame angles


Jan Heine wrote:
> Ideally, you remove the fork and put it on an alignment table,
> with V blocks. For our Bicycle Quarterly tests, we made a square that is
> clamped on a dummy axle, then aligned with the fork steerer. Scribed
> markings let us read off the fork offset. The problem is aligning the
> square with the steerer axis - easier on older bikes with the fork bend
> near the bottom and very hard on bikes with straight fork blades that
> are "bent" only at the crown.
>

I've got a hinged lever bolted to the wall which connects to the handlebar and which allows me to position a bike on my workbench. This together with a long steel ruler and an anglefinder works well enough for my purposes

-- mvg

Marten Gerritsen
Kiel Windeweer
Netherlands