I think you and I have already had this exact same conversation, but okay let's review my points again: 1. Lab tests ≠ absolute truth. Not all tests are created equal. People in these forums have repeatedly made the claim that radial tires roll slower than bias ply tires, but the tests they've shared to back up these claims ( example from Schwalbe's lab here) were performed on steel drums in a laboratory. Steel drums have been resoundingly proven to not be a reliable proxy for even smooth asphalt, let alone rough asphalt, gravel, or real world trail conditions. If...