I think a gravel bike short-travel electronic dropper such as REVERB AXS XPLR 27.2 50 could do. It is a 27.2 mm post diameter, 50 mm travel dropper seat-post. Now, it is not only deadly expensive but you also need to buy a very expensive handlebar remote at an extra price... Were I you, I would give up the whole idea.
You see, a dropper is
not for making the dismounting a bike easier. It is for the riding technique on gnarly trails. For instance, the seat is dropped on technical singletrack descents where the rider gets the seat to the bottom position, stands on the pedals, moves the butt far backwards, and that way moves their weight on the rear wheel. Or, riding in the mud or in the sand: the rider partly drops the seat and pedals in a low position to make the centre of gravity go down; it also makes it easier to support the body with the feet when necessary.
The easiest way to get off the e-bike is to support yourself on the ground on one foot then lean the bike sideways and raise the other leg
Yes it did.
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Installed on my big Vado almost five years ago. I would not do it again.