Bummer!! I just came across the same info. it is from Bike Forums of all places way back in '05.


Zona (0.7-0.5-0.7). In order to offer a tubing only 0.7mm at the butt, Columbus developed a reduced price Nivacrome that is 1000 Newtons/square meter tensile strength. This compares to the 900 used in Brain OS (and old SLX) and 1200 used in EL-OS, Genius, and our Torelli/Nemo 747.

Neuron (0.7-0.5-0.7). This is a very sophisticated tubing, much finer that one would guess from the 0.5mm wall thickness. Columbus pulled out almost all the stops to make a lightweight 0.5mm tubing, using zone butting, elliptical butting, the works. The result is a tubing that is lightweight, yet very stiff. Mondonico continues to offer frames made of Neuron because it makes a good, stiff, light frame. This tubing still has a very devoted following among serious steel frame lovers.
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trackandtrials
11-30-05, 02:55 AM

I had that same choice and made my bike out of neuron. Don't know how zona rides, but the elliptical butting made it a pain both to miter and weld. They basically have little tongue depressors of steel inside the top and down tubes in the butted section at the major stress axes (like on the top/bottom of the down tube where it hits the head tube).

It's definitely more complex than zona and the downtube is significantly lighter, but I can't tell you much about the ride difference. Oh, yeah, and I couldn't find neuron in oversize or megatubes, if that's important to ya....

http://www.bikeforums.net/archive/in.../t-156371.html

the frame looks interesting what is it? or are you afraid to tell us because we will yell at you for stripping it?