I was looking at the tern website, like dahon, they have letter such as
D, P, S, X follows by the number of gears.
What do these letters stand for?
Edit:
Deluxe
Premium
Extra premium.
Not sure about S.
My helios D7 and previous curve D3 have nothing deluxe about them, the components are basic bits you get with budget bikes...
The P ares definitely something else.