The most common tyre size on the Opel Senator is 195/65R15 (overall diameter ≈ 635 mm). Exact fitment depends on generation and engine — full breakdown below.
| Engine | Tyre sizes |
|---|---|
| Senator 2.3 CDTi - 101 PS - Diesel - 2244 Hubraum | 195/65R15 205/65R15 |
| Senator 2.3 CDTi - 90 PS - Diesel - 2244 Hubraum | 195/65R15 205/65R15 |
| Senator 2.5 - 140 PS - Benzin - 2461 Hubraum | 195/65R15 205/65R15 |
| Senator 2.6 - 150 PS - Benzin - 2594 Hubraum | 195/65R15 205/65R15 |
| Senator 3.0 - 156 PS - Benzin - 2935 Hubraum | 195/65R15 205/65R15 |
| Senator 3.0 - 156 PS - Benzin - 2969 Hubraum | 195/65R15 205/65R15 |
| Senator 3.0 - 177 PS - Benzin - 2935 Hubraum | 195/65R15 205/65R15 |
| Senator 3.0 - 177 PS - Benzin - 2969 Hubraum | 195/65R15 205/65R15 |
| Senator 3.0 24V - 204 PS - Benzin - 2969 Hubraum | 195/65R15 205/65R15 |
| Senator 3.6 - 197 PS - Benzin - 3590 cc | 195/65R15 205/65R15 |