I am getting a spare tire/wheel combo from Ebay-so I should have asked this question before I bought it. If the item I bought is an 18 inch wheel will the overall dimension of the combo be the same as my 19 inch wheels on my 3? if not will it damage my car if I drive for a small distance (20 - 100 miles) to get to a repair facility?
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Overall tire dimensions
- Thread starter KennyKO
- Start date
If you are running the same overall diameter of the tire as your other 3 wheels, the car will not even notice the difference!
They need to have the same overall diameter so the speed sensors read the same wheel speed side-to-side.
Here are 3 different OEM sizes for the Model 3 and their overall diameter:
235/45R18 - 26.3"
235/40R19 - 26.4"
235/35R20 - 26.48"
The wheel diameter is unknown to the car, the only thing it can detect is the overall diameter of the tire since it determines how fast the car is going using RPM!
