The most common tyre size on the Lexus RZ is 235/50R20 (overall diameter ≈ 743 mm). Exact fitment depends on generation and engine — full breakdown below.
| Engine | Tyre sizes |
|---|---|
| RZ 300E - 99 PS - Electrical | 235/50R20 235/60R18 255/45R20 |
| RZ 350 E - 87 PS - Electrical | 235/50R20 235/60R18 255/45R20 |
| RZ 450E - 179 PS - Electrical | 235/50R20 235/60R18 255/45R20 255/55R18 |
| RZ 500 E - 174 PS - Electrical | 235/50R20 235/60R18 255/45R20 255/55R18 |
| RZ 550 E - 174 PS - Electrical | 235/50R20 235/60R18 255/45R20 255/55R18 |