Hi Don,
We have alloys on our 10yr old Winnebago E450. No problems with about 50k miles. We have a solid extension on the inner dual and don't have any problem filling with air.
For me alloy wheels are much nicer than the chrome type wheel covers. No noises like can come from the wheel covers and no problem with the chrome things coming off (happened on a freeway in Canada). It was a pain in the x%#&@ to find it and a place to stop where I could retrieve it. We had chrome covers on our previous Motor Home.
I think you would be very happy with the way they will look on your rig.
