The tire pressure on all wheels of all Spaceships is 36 PSI. This is checked before your Spaceships campervan leaves the depot.
When on a long road trip, we recommend checking the tyre pressure monthly to make sure it is stil correct. Check the pressure and inflate your tyres when they are cold, which is when your campervan has been parked for at least three hours, or has been driven less than 2km at a moderate speed. So the best time to check tyre pressure is at the beginning of a new road trip day or being in the same place for a long time.
If the reading is higher than the value above, you'll need to let some air out, if it is lower you'll need to add some air.