Eli5: Is there a reason roller skates and roller blades don’t have spring shocks?

Question

I was thinking about this the other day…skateboards are flexible, bike tires are bouncy. Why aren’t there “performance” skates with shocks? Wouldn’t that be better for your knees?

In: 2620

Answer 1

From an engineering POV They would be expensive, need to be calibrated to the individual and would be almost entirely unessecary. Your body already has shocks built in, they are called legs.