Dave you win the battle Dave vs TÜV


But:
This is the way that Thomas says it should be mounted Dave. It 's the front mount way. Much more easy to change the rubber and screw.

Dave you win the battle Dave vs TÜV
The hub centric rings (spigot rings) are secured to the inside of the wheel by moulded plastic clips. There is actually no requirement for them to be clipped on, they only need to match the outer diameter of the wheel hub and the inner diameter of the wheel center. As long as the wheel is secure, the rings will stay in place.