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Old 03-05-14, 09:57 AM
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This morning I received a reply from Columbus Tubi in Italy regarding the nature of the Tenax tubing used by Schwinn from the mid-eighties to the early nineties. With this rather specific reply from Columbus and the description on the Nova website describing Tenax as Cromor, I'm now fairly certain it's a flavor of Cromor.

In any case, without specific butting information, we can say with certainty that it is seamed 25CrMo4 chromoly, not SL or SP.

Originally Posted by email exchange with Columbus Tubi
-----Messaggio originale-----
Da: Stan Cooper
Inviato: marted́ 4 marzo 2014 07:32
Oggetto: Information Regarding Columbus "Tenax" Tubing Used By Schwinn Bicycle Co., USA, circa 1985-1992

Dear folks at Columbus Tubi,

If possible, I would like to obtain information about Columbus tubing labeled "Tenax", and used by Schwinn Bicycle Company from the mid 1980s through the early 1990s.

While tubing descriptions and specifications are widely available for most Columbus tube sets, information about the Tenax tubing used by Schwinn is mysteriously absent.

Thank you for any information you may be able to provide.

Sincerely yours,

Stan Cooper
San Francisco, California

-----Message Reply-----
From: Columbus Tubi
Date: March 5, 2014 12:07am
To: Stan Cooper
Subject: Information Regarding Columbus "Tenax" Tubing Used By Schwinn Bicycle Co., USA, circa 1985-1992

Dear Stan,
The Tenax was the tube-set made during the middle '80, those were actually the 3 main tubes, made like the cromor tubes in seamed 25crmo4, and double butted.

Good result in term of stiffness but was not one of the light tubeset line.

Thanks and best regards,
- Stan

my bikes

Science doesn't care what you believe.

Last edited by Scooper; 03-05-14 at 01:12 PM.
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