Hey thanks for the reply. I live in central IL. Idk much about road bikes but it looks like it has nitto handlebars Suntour 3000 derailer. Dia Compe brakes. And a fi zi k seat I guess? So if I am reading the serial number right then it’s a 30 inch frame which means it is meant for like 6,4” and up lol. It seems to fit me fine though.
Site is not allowing me to post, so I had to reply here.
That could be a 1988 ST400. Could still have been made late in 1987 for 1988 model year. 27" was the biggest size.