Cooper in the phone book is almost as common as Smith or Jones. I guess there must have been a heckuva lot of barrel makers to keep the pubs well stocked with wine.

I've measured the Supercorsa carefully, and did it three times to confirm the rather strange geometry. Both the seat tube and head tube angles are considerably steeper than those listed on the Cinelli website for the current production bikes. I'm thinking it might be custom geo.

Here's what the published current geo looks like with parallel 73° STA and HTA in the larger frame sizes.



Here are the measurements from my 1985 Supercorsa. The STA is 73.9°, and the HTA is 75.6°. That HTA and the 43 mm fork rake with 700c - 25 tires result in a trail of 42.4 mm. I'm wondering just how twitchy this thing is going to be to ride.



I zeroed the Wixey on the extruded aluminum rails the front and rear wheels are on to get the centerline through the dropout centers at 0° to the horizontal, then moved the Wixey to the seat tube, head tube, and top tube. The rear axle is centered in the dropouts.



Seat Tube Angle:


Head Tube Angle (the angle changed to 75.5° as I took the photo):


Top Tube:


The weight of the frame, fork, and headset is 6.74 pounds. Not too shabby for such a big frame.

It'll be interesting to see how this thing handles.