Right, in the wheels locked scenario the dynamic coefficient is the one that matters, it's smaller than the static coefficient and that leads to a longer brakin

Right, in the wheels locked scenario the dynamic coefficient is the one that matters, it's smaller than the static coefficient and that leads to a longer braking distance. For a rolling wheel however, the stationary object is ideally just a point of the wheel, trying to move against the surface; but as soon as the wheel wins against the surface, the point rotates away and a new point tries to move against the surface. Even in the less ideal case a point of the tire always touches the same point of the asphalt from the moment it touches the ground to the moment it leaves it. So in that case you use the static coefficient. For a more visual explanation see https://youtu.be/J0PVm4XTGeY?si=20TygSRdH3UxIx_4 https://youtu.be/J0PVm4XTGeY?si=20TygSRdH3UxIx_4