Columbus Tenax was Cromor. Ref Nova Cycles, a long time Columbus distributor
http://www.cycle-frames.com/bicycle-frame-tubing/COLUMBUS-2010-CHROMOR-ROAD-TUBESET.html Here is their write up This tubeset, Chromor/Thron has a long history that includes Touring frames for Schwinn in the 80's and 90's with Prelude and Tempo models. Schwinn manufactured approximately 25,000 of these frames during this time using the name Tenax. We sold Chromor and later Thron as Columbus entry level pro tubes just below SL/SP. I have an 88 Panasonic Schwinn Voyageur with Tenax, and I was curious as to the wall thickness. Note, in 2010, they showed a TT/DT wall of 0.9/0.6/0.9. I recently e-mailed Nova and asked if the 2010 specs were the same as the 80's. I was interested since the 80's specs showed 1.0/0.7/1.0. Their reply was to the point (they probably get these questions a lot): Schwinn used both wall thicknesses and I do not know specifics of model to model for spec. The 88 catalog lists the Voyageur at 24 lbs. Also, catalog shows the SL Circuit 23" frames used SP down tubes, probably for extra rigidity. My Voyageur probably has the 10/7/10 wall due to touring design and since the 84 Voyageur SP used the actual SP tubing (hence the 'SP' in the name) which was 10/7/10. The 3 Road models probably had 9/6/9 per the lower overall weight. Cromor is a cold drawn, welded tube. SL/SP were seamless. Cromor still has respectable yield strength at 110 kpsi, higher actually than the Rivendell SILVER tubes on the Sam at 70 kpsi yield. I am currently trying to get a 80's Tenax catalog spec. Would you want the file also??? John Hawrylak Woodstown NJ On Monday, November 23, 2015 at 7:44:36 PM UTC-5, Bill Lindsay wrote: > So I sold a few bikes to pay for a mountain bike. You guys snapped up two > of my three 650B bikes, and wanted the frames, but not the wheels. > So I found myself with a surplus of 650B tires, and tried to sell off > some, but you hardly bought any of them. > So, it was irresistible, unavoidable that I buy a cheap vintage road bike > to do a 650B conversion on. Right? Right!? > > I worked at a Schwinn Shop through the mid 1980s, so I have a long > standing softspot for mid-1980s Schwinn road bikes. A standard ebay outing > includes searches for Paramount, Peloton, Super Sport, Prologue, Circuit, > Premis. They were all made either in the US or Japan. Many had Columbus > or Prestige tubing. They had great fork crowns for 650B, generally. The > only downer was that virtually all of them did not have fender eyelets. A > recent find had me looking through an archived scan of the 1985 Schwinn > Catalog. Flipping the virtual pages I was reminded of a model I had been > overlooking: the Schwinn Tempo. The 1985 Tempo was the number 4 model road > bike (Paramount > Peloton > Super Sport > Tempo). The Super Sport and > Tempo both have a Columbus "Tenax" label, but the not-very-well-kept-secret > was that Schwinn bought up a whole mess of cosmetic blem Columbus SL and SP > at a discount and agreed to label it Tenax. Thanks to the sneaky light > tubing, the stock bikes were respectably light. List weight of the Tempo > was 22 lbs. An added plus is that the Tempo was the only "Competition" > road bike that year with eyelets for fenders. > > So, having added the Tempo to my standard search, I found one almost > instantly on ebay. It looks like a completely stock attic-find. I got it > at a half-way decent price ($249) and a horrible shipping cost ($95), but > now I've got my Winter Project, again, thanks to you. I'm going to do a > 650B conversion on this nice 1985 Schwinn Tempo. > > <http://i.ebayimg.com/images/g/QNYAAOSwo6lWQSP5/s-l1600.jpg> > > Anybody want to trade me or sell me a Nitto stem with a 25.4 clamp > diameter and a 10cm or 11cm extension? > > > Bill Lindsay > > El Cerrito, CA > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
