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Fuji 331 Tubing?

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Fuji 331 Tubing?

Old 01-04-14, 05:16 PM
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leicanthrope
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Fuji 331 Tubing?

It seems like Fuji either used some sort of proprietary tubing on their bikes in the 1980's, or rebranded tubing made by someone else. My 1982 Team Fuji has a decal for double butted 331 cromo. Does anyone perchance know what the rough equivalents of that tubing might be from other manufacturers?
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Old 01-04-14, 05:56 PM
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A quick search comes up with this nugget from SCOOPER, from a few years back.
"It appears "331" is a proprietary Fuji chromium molybdenum tubing.

1983 Fuji America catalog page (https://bp3.blogger.com/_P7m8p3pz-zo/...og_Page_10.jpg). Note the frame material is "FUJI 331, double butted chrome molybdenum steel tubing with back stay, chain stay 7" C.P."

Based on the frame pricing in the 1983 catalog, it looks like 331 was second or third in terms of quality among the proprietary Fuji tube sets:

Top of the line

FUJI 9658 quadruple butted chrome molybdenum steel tubing
FUJI 331 double butted chrome molybdenum steel tubing
FUJI VALite 1769 quadruple butted steel tubing
FUJI 441 chrome molybdenum steel tubing
FUJI VALite 212 double butted steel tubing
FUJI VALite 414 butted steel tubing
FUJI 661 high tension steel tubing"
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Old 01-04-14, 06:06 PM
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For 1982, they used the 331 on pretty much all of their higher to mid-range bikes, even including the Professional Super Record.

My Fuji is really the only non-gaspipe steel bike I've ridden as an adult, so I'm trying to get a sense as to how it would compare to other marquees for the inevitable N+1 down the road.
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Old 01-04-14, 06:11 PM
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I've always thought that 331 was equal to 4130 chromoly steel.
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Old 01-04-14, 07:22 PM
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Originally Posted by cb400bill View Post
I've always thought that 331 was equal to 4130 chromoly steel.
Me too, Bill.

Saying it's "double-butted chrome molybdenum" as described on the '83 Fuji America catalog page doesn't necessarily mean it's exactly the same chemistry as AISI 4130, but close enough.
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Old 01-04-14, 08:51 PM
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Cool thread. I just looked at my '83 S-12, It has 441. Brown and gold. Gorgeous paint , chrome and decals on this near mint frame.
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Old 01-04-14, 11:51 PM
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I scored this Team at a pawn shop last week. It's an 82 with the 331 decal. I also had a NOS Team from late 82-83 that had the 9658 decal. In my personal opinion the 331 seems lighter than the 4130, but that's just my opinion! :-)





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Old 01-05-14, 10:26 AM
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I sold Fujis in the 70's and 80's and my thought is that the 331 or 441 decal, as stated above, is just their version of 4130 cromoly tubing. Many bike companies had their own decals of cromoly tubing - just look at the USA Raleigh road bikes with 555 and 888 tubing.
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Old 06-13-14, 01:42 PM
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Sort of a zombie thread here at this point, but I wanted to follow up for anyone else who might come across this later. FWIW, I had the fork out of my "331" Team the other night, and it has an Ishiwata stamp on it.
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Old 06-14-14, 12:05 PM
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That jibes with what I remember T-Mar sharing with us in some post long ago (in the T-Mar Era): he said much of the Fuji tubing was drawn for them by Ishiwata.
Given the size of Fuji and the big orders they would have placed it's possible that they had special alloys or at least weights/gauges in their tubesets...or maybe not.
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