One more voice for the Tern Cargo Rack. I put that rack on my 20" Bike Friday NWT and surpassed anything I tried before in terms of performance, including the original Bike Friday rack. The Tern rack does not fold, unlike the one from Bike Friday, but in packing the bike and its add-ons you anyway need to be creative making different items mesh together and fill the space in a suitcase - not a lot of change in the packing.