I am looking at purchasing a new folding bike for my business trips, and I was interested in the Bike Friday Pocket Rocket. However, I wanted to keep my budget to $1K or less, and Bike Friday has stock bikes for sale at a significant discount over the custom sizes. I don't plan for this to be my primary bike, so I guess I do not need to have a totally dialed-in fit. The large stock size roughly equates to a 60cm frame, while a medium equates to a 56 cm frame. I ride around a 58 cm Trek frame, so does anyone know how adjustable the stock bikes are, and whether I should err on the side of a smaller frame or a larger frame?

I spoke with someone at BF and he was trying to steer me toward a custom frame.

Thanks.