Bottom bracket maker ?

[dorset boy]

On a Chas Roberts from 1988,looks like SR in a circle ? Any idea's please.

 

[Guinessisgoodforyou]

Long Shen

 

[dorset boy]

Long Shen

Who makes that, sounds Chinese ?

 

[jim haseltine]

Started in Taiwan I think. Made all sorts of investment cast bits & pieces including cycle lugs etc. Worked closely with Tange who recently bought out the cycle parts of the buisness and transferred the tooling to their own factory.

 

[Guinessisgoodforyou]

What Jim said. Raleigh Randonneur uses them.

 

[Slbkr]

I have the same marking on my mystery frame. I found the below thread with more info but it actually seems a bit of a mystery…

https://www.bikeforums.net/classic-vintage/1269414-bottom-bracket-shell-marking-id.html

 

[mdvineng]

https://velobase.com/ViewFramePart.aspx?ID=4620da07-b6f0-4f5b-b6be-c3cea5f41a17&AbsPos=131
Taiwan made investment cast process of high quality. Used by many top frame builders from 87 onwards.
Now bought by Tange
https://tange-design.com/longsheng.php?sub_type_sn=23

 

[vcballbat]

I have been trying to solve this mystery myself as I have an 83 Raleigh SBDU 753 frame that has a seat lug with a web on the underside and have found one the same with the SR logo. I have spoken to the supplier who said they are Italian but can't remember the name.

Thread 'Lug Identification... Italian 1980's...' https://www.retrobike.co.uk/threads/lug-identification-italian-1980s-🤔.466634/

 

[Old Ned]

Long Shen were distributed by Ceeway and I have a catalogue with lots of their designs for lugs etc. A large range but, as the catalogue is 'last century', I couldn't be sure that they are all still available.

 

[Guinessisgoodforyou]

https://www.ceeway.com/