Used on my horse trailer. They fit properly, but no way to reach the back of tire to secure the hooks. Just hoping that the fit is good enough to prevent them from coming off in our high winds. A band that slips over the tire to secure it would be better. I suppose I could affix a bungee cord to the hooks if the covers fly off. I think they will be durable, but have only had them on for about a week now. No rain or wind in 2 months so time will tell.