Actually..my spare is 32 years old(1990)! It is still holding air..but that's a good point.I was surprised when I took it down from the cable hoist..it was barely hung up there at somewhat of an angle on the short handle that goes through the center hole. I really don't want to even picture that falling off and bounding down a freeway!(Yikes!)..It might have been taken down once by someone.That had to have been before 1997,before I bought the van.One thing I noticed is that the handle on the cable hoist that holds it up there is barely longer then across the hole.I'm going to drill a couple holes in that handle that holds the tire and bolt at least a 6" long steel bar across that for more support,something that can't fall through the center hole of the rim..My cable looks greased and okay..something people might want to check on their spare tire holder under the van.Drop your tire,check the air pressure(high pressure!),look for any cracks in the tire,check for breaks on the cable or the handle coming loose,and grease the cable..
I know I didn't on that van since I bought it..