Model S wheels on Model X

[ryanboyce]

I have a set (4x) of 255/40ZR20 tires/wheels purchased as a backup set for my Model S and I'd like to use them on a Model X. Is this even possible? I figured since the tires are Z rated they could withstand the extra weight of the Model X.

 

[siucity]

Z is just a speed rating. You want to look at its load index, usually the number right before the Z.

 

[ryanboyce]

Oops I mean they are "XL" Extra Load rated, here is the tire

 

[siucity]

The load index for that tire is 101. I believe that's lower than the tires that come with the X. They'd probably do fine, but I don't know if I'd do it. Plus, the diameter of that wheel is smaller than the X. It would look a bit off on the X.