Rosie,

I found that any plastic boxes don't work well with a folding bike as they work against you when you try to fold. Unless you use the bike exclusivelly as a minivelo, then that's different.

I used to use the Dahon rack with the small Axiom paniers, the ones meant for a front low-rider rack on touring bikes. They work well on the Dahon rear rack as well as the Dahon front rack. Any small paniers meant for a front low-rider will work fine.