Kalendar Perlumbaan Cincin Lembu Merah 2018
| Tarikh | Siri Perlumbaan | Bulatan | Nama Acara |
|---|---|---|---|
| 26 April - 28 April | Piala Sukan Porsche Suisse Selesai | Round 1 | |
| 26 April - 28 April | Porsche Sprint Challenge Suisse Selesai | Round 1 | |
| 29 Jun - 1 Julai | Porsche Supercup Selesai | Round 3 | Formula 1 Eyetime Grosser Preis von Österreich |
| 21 September - 23 September | Sarjana Kereta Pelancongan Jerman Selesai | Round 9 |