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19s All Around?

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I purchased a used 2016 Model S a couple of years ago and it is now time to replace the tires. In checking the sizes, the front are 245/45R 19 98W and the rear 245/45ZR 19 10RV. Another Tesla owner told me that I should have 19s on the front and 20s on the rear. In researching, it seems very confusing on what they should really be. These a Goodyear tires on it now. Can anyone tell me if it is okay to replace these with the same size of tires?
 
That’s not correct.

Some models are staggered meaning wider in the back (with a wider rim) than in front. But side walls (rim height) are usually the same all around. Others models are square (same tire all around).

Look at door plaque to see how it was shipped.

I didn’t know Tesla would use the same size tire in front and back with a different load rating. But that certainly possible. As long as both exceed requirements.

New Model S and X are all staggered.

Also go on Tirerack and see what size OEM was.
 
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