Originally Posted by
big_heineken
OK, sorry to drag my old thread but, I think I may have figured out what it is. I think its a 87/88 Schwinn Circuit. The lugs and dropouts look the same. It has 2 rivet holes in the headtube that coincide with a Schwinn headbadge. It has a Tange Aero fork.
Does anyone have a photo of a Circuit bottom bracket for comparison?
My frame actually broke the other day while I was riding. The downtube came unbrazed the BB lug. I met with Hans Schneider, a local framebuilder in Huntsville, TX, this afternoon. He said it was definitely Japanese and looked like a Panasonic, but Panasonics have a sticker, not a headbadge. Were the Circuits made by Panasonic?
AFAIK, the Circuits from that period were made in Greenville, MS...but I'd do an archive search and check for older Schwinn catalog scans to confirm that.