Q: What tire sizes does the Road Warrior use on a Model Y?
The wheel is built around OEM Tesla tire sizes, so no exotic fitment math is required. On the Model Y, UP lists 255/45R19 for the 19×8.5 wheel and 255/40R20 for the 20×8.5. Running factory-size rubber keeps your speedometer honest and your range calculations unchanged. If you would rather buy it ready to bolt on, there are mounted-and-balanced versions like the 18-inch UP-RW package and the 20-inch UP-RW package.
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