I'm sure it wouldn't hurt to have them, but we don't. When not in use, our motorhome is stored next to another motorhome on the curb side. The street side of the motorhome is fully exposed. The tires are not covered and they look the same on both sides. The tires will be 7 years old in October and look fine. The motorhome has been stored in the same spot since the day we brought it home.
I'm sure they will last longer, but they will be replaced at the end of the year just to be sure. I never got tire covers because the motorhome parked next to ours at the storage log has them and they are constantly coming off. Not sure why, but almost every time I go there, the tire covers are falling off or completely off. Often times, they are under our motorhome.
-Michael
Michael Girardo
2017 Jayco Jayflight Bungalow 40BHQS Destination Trailer
2009 Jayco Greyhawk 31FS Class C Motorhome (previously owned)
2006 Rockwood Roo 233 Hybrid Travel Trailer (previously owned)
1995 Jayco Eagle 12KB pop-up (previously owned)