Why does Tesla recommend a tire pressure of 45 psi for my 60D MS? The curb weight is roughly 4600 lbs. With full load, that brings the total weight to 5600 lbs, or 1400 lbs/tire. The stock Goodyear tires having a load inflation chart as follows: 30 psi - 1411 lbs 31 psi - 1458 lbs 32 psi - 1492 lbs 33 psi - 1527 lbs 34 psi - 1561 lbs 35 psi - 1598 lbs 36 psi - 1653 lbs This is as high as the chart goes! The maximum load for each tire is reached at 36 psi (1653 lbs). The tires can accept pressures up to 51 psi. But what is the advantage? Inflating the tires to 45 psi will help fuel efficiency and range, slightly. But I would think that savings would be more than offset by the shortened tire life due to over inflation. Furthermore, ride quality suffers quite a bit at high PSI and so does handling. What am I missing? I've been inflating to 45psi, per the door jam. But the ride is rough. I would like to know why I need 45psi? If it's only to maximize range, and not for safety, that I'd like to lower it! It seems like the proper inflation would be in the same range as other cars (32 psi - 35 psi). And that's assuming the car is loaded up with 5 passengers and luggage. I'm not an expert and I'm not recommending anyone lower their air pressure. I would just like to understand what I'm missing. Thanks.