Weighty discussion. Different than the 1985, but according to the Trek brochure, my '87 520 Cirrus is sub 25 pounds. What size are they referencing, I don't know but mine is not built like stock anyways. Have yet to scale it, yet it feels every bit more than 25. Frt. / rear racks, bags, mudguards, lights, guessing its 29 / 30.