Birdy factory folded dimensions: 61x33x72cm
Just like for the Brompton, the folded length of the Birdy depend of the saddle mounting.
Both bikes have a seatpost with an offset (on the Brompton, the offset comes from the pentaclip).
With the offset to the front, the folded length is smaller than with the offset to the rear (the same apply for the folded height of the Brompton that also depends of the pentaclip adjustment)
.Birdy seatpost with offset to the front:
Birdy seatpost offset to the rear
The Dahon Curl has (or had ? at least some models had it) a clever folding saddle mounting system that reduces the folded size.
