Ok, the consensus is treat the single walled wheels to be used in this situation with common sense. This bike is nothing more than A-B transport on paved roads but icy conditions are rough, like mini potholes and speedbumps sometimes. The hubs are freehub type. I too would prefer a good double walled rim in a 36h, especially on the rear. I ran a 32h double walled on the back for the last two years before the BRC frame failed and without any problems.