Peter Kohler wrote:
>
(snip)
> I've yet to find any data as to what geometry Cinellis of the 1960s used
> vs. the 1970s; surely the Speciale Corsa wasn't the same from c. 1948
> onwards? Or were they that good?
Here's mine: 1960 Cinelli SC #7094
(center to center) Seat Tube -- 55.5cm Top Tube -- 56.0cm BB drop -- 8.0cm Chain Stay -- 42.5cm Wheel base -- 102.0cm Seat Tube < -- 73.0° Head Tube < -- 73.0° Fork Rake -- 5.5cm Trail -- 4.6cm*
*wheel dia. 68.0cm
http://www.kreuzotter.de/
Measuring: For fork rake I have a plexiglas gage called a "Gabe Meter" made in Germany in the early 1980s that has a v-block (with magnets) on the back that attaches at the top of the fork leg that has a scale you read at the pointed end of the QR.
For head angle and seat angle I use a 4' long metal straight edge along top tube and a draftsman's 14" adjustable triangle that has a degree scale on it to measure the angle.
I think this is much more accurate than one of those angle finders that relies on leveling the top tube first (fluid filled, with floating pointer?).
I also use the 4' metal straight edge and a vernier caliper to measure the BB drop.
Anyone have a better method to measure fork rake, head and seat angle?
Chuck Schmidt South Pasadena, Southern California
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