2021 Model S 21' tires

[2021MS]

Currently have Michellin 295 30/21 back tires.
Would like to widen the back tires to 315 30/21.
Is that possible? Tire shops are anxious and saying I have to check with Tesla.

 

[Bull]

Currently have Michellin 315/30/21back tires.
Would like to widen the back tires to 315 30/21.
Is that possible? Tire shops are anxious and saying I have to check with Tesla.

Did you ever resolve this? I need to replace the 295/30/21 rears and they are backordered. If the 315/30/21 tires (Michelin Pilot Sport 4S) fit and look ok then that might be the solution. They are available now.

I'm also concerned about road noise. If anyone has any feedback.