Originally Posted by
Ritterview
[*]Though full wheel covers are restricted to time trials, there is no restriction on 80 mm rim depth, as these are occasionally seen on road races.[/LIST]
A couple of nit-picks:
1) Wheel covers are not permitted in UCI events - however actual disk wheels are for non-mass start events.
2) Wheels over 25mm in rim height, less than 16 spokes, or spokes greater than 2.5mm in thickness require testing to something the UCI calls a "rupture test" to permit use in mass-start events. That said, the list of wheels which have passed this test is lengthy.