This is my first post in this great forum, but as an owner of a Dahon Speed D7 I would like to clarify some facts to potential buyers of this bike.
The old model had Roulez 20x1.5 tires, the new one Rotolo 20x1.75, more comfortable but slower.
The old model had a rear cogs of 11-30, the new one 12-28, harder on hills, slower on flat terrain.
Many web sites advertise the new model with the old specifications, and that's is wrong in my opinion.
Dahon should be clear about it and drop the word Speed in the new Dahon D7.
Buyer beware !