Q: Will this make my Model S or Model X ride harshly?

Spherical bushings transmit a bit more road feel than compliant rubber, since that directness is exactly what removes the vague, disconnected sensation. The trade is a firmer, more communicative rear end rather than a punishing one, and running a lighter forged wheel such as our Model S / Model X UP-04 wheels drops unsprung mass to keep that firmer setup composed over bumps. If your priority is the softest possible ride, know that any deflection-reducing upgrade tightens the car up somewhat.