My 84 Trek 660 with Reynolds 531cs tubing in it's old racing form weighed 20.5 pounds, but thats with steel forks which would drop a pound by going CF, plus you could lose more weight if you replaced seat post, bars cranks etc with CF parts. 84 Trek 760 with Reynolds 531c and pro tubing was about a 1/2 pound lighter then mine, and Ishawata had 017 tubing that was even lighter then the 531pro.