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Frames and Framebuilding (1982) Straight Talk on Steel

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Frames and Framebuilding (1982) Straight Talk on Steel

Old 10-24-20, 06:16 AM
  #1  
SpeedofLite 
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Frames and Framebuilding (1982) Straight Talk on Steel

Another big article with lots of tables and figures.
Too many pages and too large a file size for a single post.
So here's the deal.
You get first page, tables, figures, and glossary of terms to wet your beak.
If you like your beak wet, you can dive right into the deep end and download the full article pdf here: https://1drv.ms/b/s!AgHfxA8atbGnlj7Z...z-mOY?e=7QjDIs
























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WTB: Slingshot road model (1990s era; 18" L or 20" XL frame size)
WTB: Slingshot promotional documents (catalog, pamphlets, etc).
WTB: American Cycling May - Aug, Oct, Dec 1966.
WTB: Bicycle Guide issues 1984 (any); Jun 1987; Jul 1992; 1993-1998 (any)
WTB: Bike World issue Jun 1974.











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Old 10-24-20, 11:43 AM
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GMS 
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SpeedofLite, I want to thank you for providing these articles!!

I remember a frame we had about 1974 that the seat tube was so thin you could feel it flex just squeezing with your hand. I know it was not Reynolds or Columbus. I think it was Vitus tubing. We were getting frames from UK like Mercian, Condor, Bob Jackson, Ron Kit but can't remember what this one was.
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Old 10-24-20, 04:37 PM
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That same issue of bicycling is filled with all kinds of awesome stuff.
The cover and article, Italy vs. Japan is great also!
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Old 10-24-20, 09:34 PM
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Love these old articles! Is the seat tube thickness correct for Columbus SL? 0.9/0.9 would mean a 26.8mm seatpost. I thought a standard SL frame would take a 27.2 seat post?
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Old 10-24-20, 10:29 PM
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The articles are super neat but my favorite thing is seeing the old adverts. Those Brooks booty shorts!!!!! Also I kind of like that Montague Road bike, I wonder if anyone has one here with pictures to share.
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Old 10-25-20, 12:23 AM
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The SL frame I have from the 70's has a 27.0 seat post, yet I have another SL frame from the 80's that uses a 27.2 seat post.
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Old 10-25-20, 12:50 AM
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RiddleOfSteel
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Tubing thickness down to 0.3mm!!!

My 195-ish lb self would break it!
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Old 10-25-20, 07:52 AM
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Originally Posted by icemilkcoffee View Post
Love these old articles! Is the seat tube thickness correct for Columbus SL? 0.9/0.9 would mean a 26.8mm seatpost. I thought a standard SL frame would take a 27.2 seat post?
Columbus SL double butted tubes are 0.9/0.6/0.9, but the seat tube is single-butted, 0.9/0.6 with the thin end at the top.

The Bicycling! article's chart of tubing specifications contains an error in that it gives the Columbus SL seat tube wall thickness as 0.9/0.9

Columbus' own data sheet shows the correct thickness as 0.9/0.6:
Attached Images
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columbus-sl-specs.jpg (120.4 KB, 84 views)

Last edited by JohnDThompson; 10-25-20 at 01:24 PM. Reason: Notice error in article's chart
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Old 10-25-20, 02:35 PM
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Its always nice to see hard numbers. Reading posts where people wax poetically about the spirit of a tubeset is long on hype and short on substance.

Columbus SL being mostly the same as common man Tange 2, for example(not knowing the butting profiles and assuming they are pretty much the same).
SL had a thinner seat tube as it was single butted, but in identical shapes the Tange 2 stays would be less prone to flex.
Also, 531 had some beefy seat stays for its class/level.

- Tange 1 was a fantastic offering, given the price.
- Ishiwata 019 is on very few prodution road frames that I see, even though specs are solid.
- I don't think I've seen a bike with Columbus Record, KL, or PL tubes.
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Old 10-27-20, 10:23 AM
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This is a great compilation of information.

One detail to take with a grain of salt: The weight of tube sets looks like it consistent within a particular manufacturers, but is not necessarily comparable between different manufacturers. For example, Ishwata Magny V and Columbus SP have similar wall thickness but the weight shown differs by a kg. Butting profiles could account for some of that, but I would speculate that the length of the tubes in the two sets are different.
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Old 10-27-20, 10:42 AM
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Table 2 is interesting in that lots of riders may not consider that info when critiquing a vintage bike. Someone may have a negative opinion of an old race bike, and apply that experience broadly. But then you find out that they weigh 230 lbs., or more! Well, of course that old bike felt like a noodle. It wasn't designed for riders that heavy. Same for a bike that felt "dead" or "stiff." That may be the case if you are 130 lbs. and trying to push an SP framed bike.
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Old 10-27-20, 10:43 AM
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Nice to see all the main tube sets of that era with their specs in one chart. I see now that Tange #2 is almost exactly the same gauge as Columbus SL. It's the same except for the stays being 0.8 mm rather than 0.7 mm. I had always thought it was closer to SP.

A long time ago I had a Mondia made from 531 SL. I don't often see it mentioned, and it was nice to see it listed in this article. The bike built up crazy light, like 18lbs and change with pedals. It was a bit mushy for my taste.
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