The range listed on the Dahon website is 38 - 85 gear-inches.
This is technically false, and not the 307% range of the Nexus 8. The 38-85 range was probably true for the previous SA 5 speed.

I emailed Dahon a while back and asked them to update the info. I don't know what they are waiting for, but it is not updated yet.
I do not know for sure what the gear-inches are, which tires are supplied, or the actual weight of the 2008 Curve SL.

What's up with Dahon?