In defence of LaMere, there bikes are the real deal when it comes to lightweight full power bikes, but they often dont get taken seriously because they still use external batteries.
The issue at the moment is that aesthetics trump engineering when it comes to making a lightweight full power bike - if you go down the external battery route, and stick with a 504wh battery then its possible to get close to or at 20kg - the beauty of the external battery ecosystem from shimano is that you can easily swap in a 630wh battery if wanted.
Engineering the battery into the frame means more weight - the internal batteries weigh more compared to their external counterparts, and the free needs more reinforcement too.
Wisper Bikes, who are more famous for building shopping bikes, produced the Wildcat four years ago - they only did it for one year as sadly they didn't really get the word out, as it was a great bike, I believe based off the same frame as the Lamere. There is a guy out in Surrey Hills who has built one up to be (claimed) just under 20kg, running some very high ens kit, carbon wheels etc.
I believe that if brands wanted too they could easily build a 20kg full fat that is not crazy money, by using an EP8 with external battery. However the market just won't buy bikes with external batteries anymore.
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