I own a 04 Astro Cargo Van which has a 16 inch tire - the older Astro's had 15 inch tires and further the 16 inch tire I have on it is a small 16 inch tire smaller than allot of 15inch tires - now a 15 inch tire costs allot less - can't understand why they would put a 16 inch tires on this small Van when many 1/2 ton trucks have only 15 inch tires - I ask are there any advantages in having a 16 inch tire as opposed to a 15 inch - I'm one who doesn't believe in putting over size tires on any vehicle.