6 tires cost me $1500. If I need to replace them every 7-8 years because of UV aging, this is about $200 a year.
4 covers cost $50. If these extend my tire life by just 1/2 year, they more then paid for themselves.
It only takes about 2 minutes to put the covers on. I put the covers on if I'm going to be parked in the same spot for more than a few days.
2001 Coachmen Mirada (Ford F53 6.8L V10) - Toad 2003 Saturn Vue
It won't do MACH 2, but I can get a sandwich and take a pee.