The rears are Firestone, 21.5L -16.1 mounted on 18" rims (I think means 18" wide) and the fronts are Goodyear, 29 x 12.5 -15 NHS. The 3rd rear tire is old, worn, and weather cracked. Yes, the fronts are about 50% at best. (note, there are 5 tires and 5 rims) I'll check to see if they have a...