Try the Schwalbe Marathon Racers. I had a lot of flats on my Selvios in that tiny size on the SpeedPro. Again if you are a big person or ride in areas that you are more likely to get flats, you might want to consider the Speed TR. A lot of the basic goodness and more of the SpeedPro but not quite as fast. Sadly Dahon pulled the wonderful Magura hydraulic brakes they had on it and went with something I feel is definitely inferior.

Think of the SpeedPro as a high maintenance woman. I am sure you know the type. They can offer a lot but are they really worth the effort when you can find something as good with less hassle? If you want the equivalent of almost a "folder" race bike and all that entails, then maybe the SpeedPro is a great choice for you. Then again you get stuck with the losses of the internal hub so when you are in the highes range of gears, you have lost mechanical efficiency to the internal hub.

Don't get me wrong, I like the dual drive (DD) a lot. I've had it on several bikes. It would not be my pick though to go on an all out speed oriented bike. Sure you can advertise a great gear rang but the 1:1 ratio on the DD is the middle range. So where your powere losses mean the most is going to be when you are in the top gear range and really trying to go fast. It is a great hub for touring but is the SpeedPro really a touring bike?

Regardless of what I say, ride and see what you think. I found it fragile and required a lot of upkeep. The eslatomers in the front hub were a PITA. Break adjustment was critical because of the floating wheel. Mine had the clickbox on the back for the DD, not exactly a bulletproof item. It is a good bike but if fold isn't quite a critical, I'd buy a Swift(Xootr) and build it exactly as I wanted. My Swift cost about the same as a SpeedPro but I have never had any issues with it and it is about as fast for me. Keep in mind I have a full internal hub but it has been awesome. I can also get out of the saddle and pump hard with no flex. If I did that on my SpeedPro it felt light spaghetti to me. Keep in mind I am at the upper weight limit for the SpeedPro so if you are in the light weight range that I think they were actually targeting the bike at, then your experience may differ. It does illustrate the relative stiffness of the frames though and appendages. The SpeedPro's frame may be fairly stiff but I could flex everything attached to it with ease. Not so on my Swift.

If you could describe the type of riding you are going to do, we might be able to give you better feedback on other options that you might want to test ride if you can.