Weir also upgraded to Pirelli P Zero tires, explaining, “My Pirellis are X-Y rated. They are good to 220-230 MPH for less than an hour.”  As more and more C5 drivers join the 200 MPH club, weird science stories are emerging. He mentioned the one circulating about floating ashes. “Somebody told me it would do it, so I tried it. One day I got out on the highway between Melrose and Ft. Sumner, New Mexico, and