What is Raleigh 555 tubing?

[otherself]

What exactly is it? I've seen a few models between 1982-86 made with it.

 

[Midlife]

It's one of their cro-mo tubes, they did 575 and 400 as well, probably more.

I guess it's the composition of the components?

 

[non-fixie]

Or the sponsor, perhaps?

 

[paton]

Accles and Pollock , possibly.

https://www.reynoldstechnology.biz/the-evolution-of-steel-with-853-and-631/

 

[Guinessisgoodforyou]

I think 555 was used by Raleigh USA. Used to make cheaper cro mo frames sound better. I could of course be wrong. Further research would be needed for a definitive answer, if possible.

 

[FluffyChicken]

It could be anything, it is just a branding Raleigh used, I have a document somewhere I snipped something from some time back... one tick,

a snipped I grabbed from a forum, you could back search this to find more maybe
"The general cheat sheet is that 555RSL is Reynolds 531, 555T is triple butted cro-mo and thus may be Ishiwata EX, 555SL is double-butted cro-mo and a rough equivalent to Tange 2 or Ishiwata 022, and 555 on its own is straight-gauge."
edit and I missed this out too
https://bikeretrogrouch.blogspot.com/2015/07/reynolds-stickers.htmlEDIT to add, reverse search it , it was this post. Read the whole topic though.
https://m.bikeforums.net/printthread.php?t=1190351&pp=30