Vehicle: 1930, 4-door, 2-window Tudor
Tires: Firestone, black wall, 4.50-4.75-21
Question 1: What does the 4.50-4.75-21 actually stand for?
Question 2: Ignoring brand, are these the proper tires for this vehicle?
Question 3: Proper PSI for these tires? 32 psi?