Richard Mille RM40-01 Speedtail,based on the form of a teardrop, the most aerodynamically efficient shape found in nature, the Speedtail is the apotheosis of the streamlined hypercar, a three-seat grand tourer that became the third car in McLaren’s Ultimate line-up. McLaren’s relentless pursuit of aerodynamic efficiency provided the starting point for the design of the RM 40-01 Automatic Tourbillon McLaren Speedtail. Limited 106 Pieces.