On ours, all rear tire valves were inaccessible, and when my tire guy came to install extenders etc. we discovered the inside right rear tire was flat, due to one of the inaccessible tire valves leaking. After pulling the tire and inspecting it inside and out, no damage, he installed new steel valve stems, ran extenders from the outside wheels, an mounted the fill valves on the wheel covers. Very accessible all four now, checking rear tire pressure, no problem now.
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