I picked up a partial Suntour Ole group off eBay over the summer (as part of my recent painted white parts obsession) and I'd been wondering what the heck to do with it.
Since the Ole group was found on mid-range bikes at the time, I needed to find a suitable frame to hang the parts on but what?
The parts originally came off a Nishiki International that looked like it'd been left outdoors for maybe most of its life, but an '89 International is pretty hard to find these days. So - since I'd been working on a Circuit, I didn't have to look very far to find a suitable Schwinn candidate, namely the Tempo. But what was this "Columbus Tenax" tubing all about?
I remember seeing the Tenax tubes back in the day and just dismissed it as some crazy, cheap tubeset Columbus sold to Schwinn and gave it some weird name just so it wouldn't be recognized as a crazy, cheap tubeset. It wasn't unheard of for a bike to use a Columbus tubeset found only on that particular bike model, although this was probably more marketing gimmick - some variation of an existing tubeset was used - than anything else. For example, I have a Colnago Altain that uses Columbus Altain oversized tubing. I'm pretty confident you won't find the Altain tubing on anything other than that particular Colnago model. What exactly is Altain? Heck if I know, but anecdotal evidence seems to put it in the same category as another oversized tubset of the same era, Brain.
Fast forward to the present and while looking around for a nice Tenax Schiwnn frame, I came across all sorts of opinions as to Tenax's true origins, everything from gaspipe to (gasp) Columbus SL?? Could it be true? Did Schwinn really produce midrange sleeper bikes that used one of the most venerable Columbus tubesets of all time in disguise?
Then something clicked in my head and while searching my old mags, I found this in my '87 Bicycling Buyer's Guide
From the review: "
Tenax, used exclusively by Schwinn, is Columbus's production-grade version of its SL and SP professional series."
Now, that could mean a lot of things, depending on how one defines "production grade". However, I think one can safely conclude that Columbus Tenax is more closely related to SL and SP than it is to gaspipe and probably on par with the tubes found on equivalent Asian-born models of its day. Also, aside from the Paramounts, I believe all the Schwinn models using Columbus tubes were limited only to the three main tubes, with the stays and fork made from Tange or similar tubing.
So, does this mean that you should be putting your Tenax-equipped ride with its newfound Italian heritage on ripmeBay now and watch the bids come pouring in? Probably not.
BUT - does this mean that you should love your vintage Tenax-tubed Schwinn even more now?
You betcha!