Originally Posted by Kontact

That's a 3.0 frame, first introduced in 1989. That's probably 90 or 91. Aluminum fork and thin seat stays - I had one for 20 years and it rode much nicer than the preceding '80s models due to those features. First production bike with a sub 3 pound frame weight. Well designed geometry, too.

This was probably one of the bikes with 128mm hub spacing so you could put 126 or 130 hubs in place.

Vintage Cannondale has the catalogs if you want the specs. That thing is huge - 62?