[CR]Re Mexico cranks


From: "Greg" <gtsoftley@ozemail.com.au>
To: <classicrendezvous@bikelist.org>
Date: Tue, 31 Jan 2006 09:52:30 +1100
Subject: [CR]Re Mexico cranks

I have had quite a few Mexico cranks pass through my hands and still have several. I took a comparison photo of three Colnago cranks last year during a bit of a rationalisation. Check the reverse side of the cranks in the Mexico album http://au.pg.photos.yahoo.com/ph/gts753/album?.dir=956b&.src=ph&store =&prodid=&.done=http%3a//au.pg.photos.yahoo.com/ph/gts753/my_photos

What was evident is that there were differing amounts of material left, after milling, to re-inforce the crank - as seen by the photos. The machining on the crank spider arms often had waves - including the groove in the crank arms - which is the sign of a totally hand crafted (held?) modification. It seems as though some cranks were pulled from production before and after stamping by Campagnolo - no fixed rule. The polishing of the cranks to the mirror finish would help compensate for the loss of material bulk in regards to strength which is in accord with recent posts concerning the smoothing of Campy cranks to prevent cracks starting. Still, you wouldn't find me pushing a Mexico crank on an assault of the Pyrenees - more likely on a Sunday mornng coffee run where the true value of the crank can be justified - you know what I am talking about. Greg Softley Still looking for Bi-valents!!!!
Coffs Harbour
Australia