Correction, I was having problems reading the 1981 Tange Catalog .PDF file when I scrolled using the wheel on my mouse. Old ,PDFs will do that...
I wrote:
Here's the differences [between Tange #1 & #2] right from the 1981 Tange Tubing Catalog:
Top tube wall thickness:
#1 0.6mm x 0.3mm x 0.6mm [should be 0.8mm x 0.5mm x 0.8mm]
#2 0.8mm x 0.5mm x 0.8mm [should be 0.9mm x 0.6mm x 0.9mm]
Down tube wall thickness:
#1 0.8mm x 0.5mm x 0.8mm
#2 0.9mm x 0.6mm x 0.9mm
[All other tubes are the same. The 0.6mm x 0.3mm x 0.6mm were used in the Tange Champion Pro set. Hard to read .PDF file...]
Charles Colerich Oakland, CA USA
james black wrote:
> On Sun, Jan 16, 2011 at 13:20, verktyg <verktyg@aol.com> wrote:
>> Here's the differences right from the 1981 Tange Tubing Catalog:
>
> Interesting data, and I don't doubt the integrity of your information,
> but it contradicts what I've heard from some other sources, that the
> #1 used .8/.5/.8 and the #2 used .9/.6/.9 for both top and seat
> tubes*. I find these figures plausible, since #2 bikes don't seem
> particularly flexy; and my #1-labeled Centurion Semi Pro doesn't have
> a crazy-thin top tube that I can deflect with a pinch between thumb
> and forefinger.
>
> Maybe they lightened up their tubes (which is to say, shifted their
> numbering system) in 1981 - my experience is with 1976-1980 framesets.
>
> *See http://www.sheldonbrown.com/
>
> James Black
> Los Angeles, CA