We have lost both rear wheel simulators. There is a problem with the way it attaches to the wheel.
I tried to get the dealer to cover them under warranty, they said road hazard!!!
I have since replaced them with another brand for a third of the cost from the Forest River dealer.
The new wheel simulators have worked great.
Yes, mine fell off also. Especially the rear. I noticed that this is a problem with the factory wheel simulators. I noticed that new models use aluminum Alcoa wheels. I didn't actually lose my one rear wheel Cover. It fell off and refueling station. I later straped the simulators with stainless steel ties recently. We will see how this works. 4 ties on each wheel. Amazon has them. This seems to be a real problem for everyone.