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09-02-2003, 04:50 PM

"B. Sanders" <barry@bsanders.net> wrote in message
news:bj0v8j$rhk$1@wildfire.prairienet.org...
> The 56cm Sekai 2400 road bike that I found in a dumpster a few weeks ago
has
> this printed on its seat tube decal:
>
> Tange High Tensile Butted Tubing
>
> Never heard of such a thing. Why bother butting high-ten steel?
>
> IIRC, the Sekai 2400 was a pretty decent Japanese-made bike in the
mid-80's.
> It has Suzue/Sekai hubs, welded-and-ground 27" (630 mm) Araya rims, Sugino
> Super Maxy cranks (cold-forged?). Too bad about the frame - it's pretty
> scratched up, but no metal damage. Looks straight. Needs paint. It has
> forged dropouts, nice lugwork, flat-crowned fork, normal reach brakes,
> plenty of fender clearance, and other nice features. I was going to build
a
> commuter out of it. Not sure how much energy I want to expend on a
high-ten
> frame though. Hmm.
>
> Comments, ideas or opinions?

I was very much involved with that bike at the time and Tange's butted HiTen
was a reasonable tube in the targeted price range ($269). It's clean and can
be brazed without much regard to upper temperature limit, i.e., quickly.
The Yamaguchi-built frames are straight and solid albeit lacking in metal
prep ( the paint frequently peeled in sheets in the first two years of that
bike, especially in the light blue color).

We also used the butted HiTen tube in bikes all the way down to $200. It
was very affordable. Sekai 2400 with forged horizontal ends make a nice
urban single speed as there is a lot of mudguard clearance. A 1975 with
verticals of course is more limited.

And 56cm? On centers maybe? Theoretically it was made in 18, 19, 21, 23,
25 and 27 inches to top (no ladies' in that model)

SuperMaxy cranks are not cold forged. They do take an easy-to-find 110mm
chainring though.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

09-02-2003, 04:50 PM	#5 (permalink)
A Muzi Posts: n/a	Re: Tange High Tensile Butted Tubing? "B. Sanders" <barry@bsanders.net> wrote in message news:bj0v8j$rhk$1@wildfire.prairienet.org... > The 56cm Sekai 2400 road bike that I found in a dumpster a few weeks ago has > this printed on its seat tube decal: > > Tange High Tensile Butted Tubing > > Never heard of such a thing. Why bother butting high-ten steel? > > IIRC, the Sekai 2400 was a pretty decent Japanese-made bike in the mid-80's. > It has Suzue/Sekai hubs, welded-and-ground 27" (630 mm) Araya rims, Sugino > Super Maxy cranks (cold-forged?). Too bad about the frame - it's pretty > scratched up, but no metal damage. Looks straight. Needs paint. It has > forged dropouts, nice lugwork, flat-crowned fork, normal reach brakes, > plenty of fender clearance, and other nice features. I was going to build a > commuter out of it. Not sure how much energy I want to expend on a high-ten > frame though. Hmm. > > Comments, ideas or opinions? I was very much involved with that bike at the time and Tange's butted HiTen was a reasonable tube in the targeted price range ($269). It's clean and can be brazed without much regard to upper temperature limit, i.e., quickly. The Yamaguchi-built frames are straight and solid albeit lacking in metal prep ( the paint frequently peeled in sheets in the first two years of that bike, especially in the light blue color). We also used the butted HiTen tube in bikes all the way down to $200. It was very affordable. Sekai 2400 with forged horizontal ends make a nice urban single speed as there is a lot of mudguard clearance. A 1975 with verticals of course is more limited. And 56cm? On centers maybe? Theoretically it was made in 18, 19, 21, 23, 25 and 27 inches to top (no ladies' in that model) SuperMaxy cranks are not cold forged. They do take an easy-to-find 110mm chainring though. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971