I use Armour All Extreme Tire Shine with UV protectant each time I wash the coach. I find it does a great job protecting the tires and makes them look good and I don't have to lug around or install those tire covers.
2019 Winnebago 22M
2015 Jeep JK Rubicon
Former Owner, 2006 Alpine Coach 36MDDS
Former Owner, 2005 Tioga 31M and Arctic Fox 22GQ