Neatly done. I had pondered how they were going to apply the trike fold to the bikes, but hadn't thought of that method. Very minimalist adaption.
It looks like the rear section of B1 is the same as that of the rear-suspended trikes (and maybe the rear of the B2 is from the Vortex trike).
Doesn't quite look like that to me - I think it was before the folds, but not now. The trikes have the hinge on a 45 degree angle, so the rear wheel is rotated 90 degrees out by the time it gets onto the front. Here they've just aimed to get the rear wheel sideways by 10-20 degrees by the time it's round, so it slots alongside the front. So the hinge looks nearly straight up/down, but is actually 5-10 degrees out. Clever buggers.
<Secretly relieved they haven't updated more of the bike, and left me feeling jealous with last years model...
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