Thanks for the input. For the record, my friend told me to count spokes, right after I posted. And I had the sense to ask here first.

I have a 2010 Brompton, so single walled rims. How are double walled better? If I want to stick with exactly what I have now, how do I figure out what I have?

It might be a good idea to buy from David at bFold. If nothing else, I don't want him to fold (no pun intended) like NYCeWheels.