It makes no sense to me. Tyre pressures are advised to be set cold but if I put them at 45psi in the summer then from experience they will be as low as 40-41 on a frosty morning. If set at 45 on that frosty morning they go as high as 49 cold on a summers morning. Even in winter set at 45 cold they will hit 50+ on a long drive (which is the tyres rated max...but one assumes that is it's rated cold max). I was at the garage this morning having a small puncture fixed (local guys are nice ..I was happy with the £10 charge compared to Tesla wanting to sell me a new tyre last week). Garage really didn't have any answer to the pressure question apart from 'we don't worry about it'.