I'm trying to work out what my frame is, and what size bottom bracket it needs (68/71/73 mm), and the recommended spindle length. I've attempted to measure both and it seems to have a 68/115 bottom bracket.
I can't find any serial number on the frame, but someone told me, circa 2002 that it looked like a Marin.
Rear wheel hub, note the unusual markings
Rear from top