These are all under 20, but they required light wheels, carbon forks and cranks, and modern components. I have a pinarello Montello es steel with an aluminum fork and 8 speed campy 8 speed setup that weighs about 21. My vitus 992 with c record and zondas also weighs about 21.

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Truth be told, there is a point of diminishing returns. Nice steel and good light stiff wheels make substantially more of a difference than a few pounds of static weight. My ride times with those are comprobable to that of my sworks aerotec with sram red that comes in at 15.5...but I feel substantially less beat up riding steel.