I used to use Moab Entrada Natural Rag which in fact is a (excellent) double sided paper. And even though its pretty "thick" cotton paper (300g) I had no wheel marks or anything distracting on either side, when I made double sided prints. I did not do that very often, but when I did it worked flawlessly. It should be mentioned that was on my old HP Z2100, but that should not make a difference, since both models are identically constructed. Moab Kayenta is also a double sided paper made by Moab which should work fine, Entrada however delivers the better prints in terms of gamut and Dmax and paper feeling!