Yes the rotor (brake disk) spins with the wheel and the caliper is stationary just like a real car. I think they are worth a try, it's a nice item to have, would I put them on all my cars? No, just on a show girl. If they need to much attention I"ll pull them off and keep them on a car that I don't use as much. I'd rather spend my time drifting than fussing with the car on the track.

The other thing I don't like about it, is that you replace your original bearings with the one the kit brings. The replacement bearings are smaller in width (thinner), I put on a lot of hours drifting my cars and I see replacing these bearing in the very near future with full ceramic ones since they are thinner.