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Bottom bracket shell marking ID

Old 03-26-23, 05:06 PM
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Bottom bracket shell marking ID

I bought a Giordana frame several years ago. It doesn’t have model decals, but it does have tubing decals on the seat tube and forks - Columbus SL. The bottom bracket shell has “58 SL” stamped into it. I believe it’s a late 80s-early 90s frame, perhaps a Scorpius or Antares model.
I’m curious about the manufacturers mark cast onto the bottom of the shell. Raised letters within a circle read, “SR” - I think.
I appreciate any thoughts on what “SR” signifies. I know there’s some mystery about who built Giordana frames. Perhaps this mark could shed some light.




Giordana bottom bracket shell
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Old 03-26-23, 11:19 PM
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AFAIK there's no mystery about *most* Giordano frames: they were built by Billato.
This BB shell is investment-cast and that logo is the shell maker, unlikely the same as frame builder.
I don't recognize it as being one of the well-known Italian IC brands but since there's a recognizable "R" perhaps it's an early Roto?
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Old 03-27-23, 06:16 AM
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Originally Posted by unworthy1
AFAIK there's no mystery about *most* Giordano frames: they were built by Billato.
This BB shell is investment-cast and that logo is the shell maker, unlikely the same as frame builder.
I don't recognize it as being one of the well-known Italian IC brands but since there's a recognizable "R" perhaps it's an early Roto?
Whoever made that BB shell, it looks like @cudak888 's recently-purchased Raleigh may have the same - or a very similar - marking on it's BB shell (lower right in photo below). So Raleigh may also have been using it at some point.

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Old 03-27-23, 07:06 AM
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It's definitely the mark of the bottom bracket shell manufacturer, independent of the builder. Even though it's the first thing that pops into mind, I doubt its Sakae Ringyo.

A framebuilder active during this time may know. What era is the Giordana from? The Raleigh is a '91.

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Old 03-27-23, 09:03 AM
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Old 03-27-23, 09:27 AM
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Originally Posted by cudak888
It's definitely the mark of the bottom bracket shell manufacturer, independent of the builder. Even though it's the first thing that pops into mind, I doubt its Sakae Ringyo.

A framebuilder active during this time may know. What era is the Giordana from? The Raleigh is a '91.

-Kurt
Based on the tubing decals, it’s late 80s - early 90s.

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Old 03-27-23, 02:17 PM
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Bottecchia used the same markings on their BB shell to indicate frame tubing ajd size in the mid to late 80's......
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Old 03-27-23, 07:08 PM
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Originally Posted by dougb
I bought a Giordana frame several years ago. It doesn’t have model decals, but it does have tubing decals on the seat tube and forks - Columbus SL. The bottom bracket shell has “58 SL” stamped into it. I believe it’s a late 80s-early 90s frame, perhaps a Scorpius or Antares model.
I’m curious about the manufacturers mark cast onto the bottom of the shell. Raised letters within a circle read, “SR” - I think.
I appreciate any thoughts on what “SR” signifies. I know there’s some mystery about who built Giordana frames. Perhaps this mark could shed some light.
Frame is by Billato I'm sure, BB shell I have no idea.
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Old 03-28-23, 11:36 AM
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Originally Posted by cudak888
Even though it's the first thing that pops into mind, I doubt its Sakae Ringyo.
Exactly what I came to mind for me too. I seem to recall seeing that same (or a VERY similar) mark on the backside of some Sakae Ringyo crank arms - though memory is unreliable sometimes. (Those cranks are now in storage and I can't readily access them to check.)

But like you, I don't ever recall seeing Sakae Ringyo listed as a source of frame parts for lugged frames anywhere.
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Old 03-28-23, 03:31 PM
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Originally Posted by Hondo6
Exactly what I came to mind for me too. I seem to recall seeing that same (or a VERY similar) mark on the backside of some Sakae Ringyo crank arms - though memory is unreliable sometimes. (Those cranks are now in storage and I can't readily access them to check.)
Not quite the same:
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Old 03-28-23, 05:07 PM
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Originally Posted by JohnDThompson
Not quite the same:
True; that one's definitely different.

However, SR has used different variants of their "SR" logo. I was possibly thinking of this version - though I also seem to remember another that's even closer to the one on the BB shells in question above.



Image from Velobase.

Or maybe I'm just "out to lunch" due to bad memory. Wouldn't be the first time, and almost certainly won't be the last time either.

Last edited by Hondo6; 03-28-23 at 05:13 PM.
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Old 03-28-23, 05:20 PM
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Haden produced a couple of lug sets called Royal Sovereign. Perhaps the logo is to be read “RS”.


Haden catalog page from equusbicycle.com
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Old 03-29-23, 04:06 AM
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I've tried to find out who was behind these "SR" branded bottom bracket shells but never got very far. I had been thinking of starting a thread but, now that this one is active, I might as well just add here the info I have.


There were 3 brands of bottom bracket shells that all seemed to hit the market in Italy around the same time (mid-late 80s): BSE, Chierici (the model with their logo appearing on the underside) and SR. They had decent market presence (especially SR and Chierici) but for a very short period, as all three disappeared pretty quickly.


While I don't know who was behind these "SR" branded bottom bracket shells, I'm pretty sure they were made in Italy and not in Japan. Vast majority of examples are on Italian made frames (ITA threading), with a smattering of frames from outside of Italy (as you'll see from the list). I've never seen any examples from Japan.


Re: Sakae Ringyo, which usually gets mentioned whenever these shells come up for discussion - the only Sakae Ringyo logo (there were at least 3) that looks similar is different from the marking on these shells, so I'll just leave this side-by-side for reference:





Here's a list of brands that I've seen use SR shells:
Anselmo (Losa)
Atala
Aliverti (likely Vianelli or Denti)
Benedetti
Berma
Biemmezeta
Chesini
Denti, Mino
Faccioli
Ferremi
Ghirardi (Losa)
Giordana
Losa
Morandotti (Losa)
Morotti (Denti)
Moser, Franceso
Olmo
Paletti
Rauler
Ricci (Losa)
Tomas (likely Biemmezeta)
Vedovati
Vetta
Vianelli

Cratoni (most likely Biemmezeta)

Andros

Dave Lloyd
Harry Quinn
John Retallick
Raleigh

Marinoni

Serotta (specifically Performance Speciale, but have seen others)

The SR logo also appears on items other than bb shells, albeit far less frequently. I've seen one example of lugs with that logo:




The logo also appears on some Columbus (mostly) aero seat posts. I reached out to Columbus about this, thinking they've got to be at the center of this branding/marking, but I never received a response.










So, in the end, I don't really have much that would help move the ID further. I just hope that additional info might jog memory of someone who was involved in frame building in the late 80s who might have used (and ordered) these shells.
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Old 01-05-24, 05:34 PM
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f.lli Chierici from Parma had at least three different bottom bracket shells over a rather short time span (20 yaers maybe)...
and the Maurizio racing bikes belong to Chierici,
cheers ✌🏾

F.lli Chierici Parma

frame Melchioretto, with roto dropouts

Cicli Perrone, Torino with Chierici bottom bracket shell

Tommasini with Chierici bb shell

probably a Patelli with a Chierici bb shell

my Rivola Competition (#437) by Gianni Rivola with a Chierici investment cast bb shell, picture by me ;- )

same Rivola Competition (#437) by Gianni Rivola, older picture of the auction
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Old 01-05-24, 06:42 PM
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Cinelli tipo Spoiler investement cast bottom bracket shell was pretty popular to in the mid to late 80s, designed by Gianni Gabella, had even a patent!, with the flying c Logo of Italo Lupi from 1979, leaving the heraldry behind.
Roto had a nice shell too, used also on Gazelle ... (also nice drop outs, inspiered by Orazio Grenzi fore sure) as fork crown, pretty early already, from 1973!!!












Rebour, LeCycle, Milan show, 1 Dec. 1973, No. issue 145, magazine volume 28, the scan is from page 22 of the issue 1-5 Cinelli 7-8 Roto investment cast
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