mechanical (rigid) fan blade

If you spend a little time making sure all the pulleys line up, don't run the belt too tight, or too loose,she will last many years.My spare is still in the trunk, since about 2004.I know it sounds insane, but..........there it is.I wonder if it might have 100,000 miles.Maybe I should change it,just cuz. I really tried to remember if I ever changed it, but I just can't.
I think it's a Goodyear.