As has been mentioned, some wheel covers are fancy hubcaps that can be pried off, others require the loosening of two "fake" wheel nut covers to remove. I have the pry off wheel covers and they are really tight. I have also had difficulty checking tire pressures, often cutting myself on the openings to get to the valve stem. I found an easy solution in a hex drive handle with a magnetic socket that fits the valve caps. Easy to spin the caps off, they stay in the wrench end and are easy to put back on. A job that used to take several minutes is now about 30 seconds.