In a few days I will fire up the school bus/moving van and head south. The bus has been sitting for two years (I have started it up and run it periodically) but in that time I am sure that the tire pressures have dropped.

The tire are bias ply (i.e., not radials) truck tires, and I have no idea what the correct pressure should be. I think it's somewhere in the 80-100 psi range, but don't know for certain. I have a mobile service truck coming by the storage lot this afternoon to change the oil, check the fluids, get the bus ready to roll, but I'd like to know what tire pressure to tell him.

If you had an old 44 passenger school bus, what tire pressure would you use?

tanstaafl.