Based on a none science ping test and weight I can tell it is some kinda of OS hard tempered metal similar to 753 or Tange Ultra . It's hard and the bike curbs at 24 or so with nice suspension fork as is and has a OS 30 something seat post. So really light for a vintage MTB with a OS seat post made 90's. If it was my size it would be mine.
Last edited by zukahn1; 11-28-23 at 07:32 PM.