depends, to really tell you would need a shot of the inside, cuase although there is a base on top... there could still be base on the inside and the one you see is to keep them from poping back into the tire assoon as theres weight on them.
Hmmm i took that into account but figured since they look glued, on thats probs not the case...
Who knows this might have just been made for kicks and giggles...