This has been discussed ad-infirm-nauseam many times before. The pressure on the sidewall of ANY tire is NOT the recommended operational pressure for that tire on that vehicle, it is the maximum pressure at which the tire has been tested and can be safely operated.
DarkStar wrote:The tire manufacturer has a maximum recommendation of 44 psi on the OEM tires for the Leaf. You don't get any more expert than the company that made the product.
Heh, yes, or put another way, do what your expert (the tire manufacturer) tells you to do – to follow the vehicle manufacturer's recommended tire pressures!
Besides, how would any tire manufacturer be able to give you one number as the recommended tire pressure for every vehicle from every automobile manufacturer?! That's why they can only give you a max for the tire, not the best recommended pressure for every vehicle. Let the car manufacturer tell you what tire pressure (front and back) is recommended for each of their specific vehicles. Sure, that doesn't take into account differences in tires, but what are you going to do, just run at max allowable?! Nuts!