Low racers can vary from ~18# (VK2 and SL-II) to ~32# (stock Barons, steel M5s).
My Fujin SL-II weighs 21# with pad and pedals. My Baron the same way is ~27#. In my flat part of the world, my SL-II has little advantage over my Baron as far as speed goes. In fact, my fastest century has been on my Baron.
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“Train hard until your legs are tanned, then keep going until the shape arrives.” -Jolanda Neff