Oribike no longers manufactures a front rack/low rider to carry a pair of panniers. Would a third-party solution work on that fork that requires removing the wheel for folding?
Alternatively, could a ~20 liter bag sit either on the stem+handlebar, or above the frame?
Another solution could be to split stuff in three bags: Stem, saddle (eg. Carradice), and rear rack.
Has anyone used an Ori/Mezzo for touring?
