I've been wondering about this, ever since folks started talking about not running the run-flat tires. One significant factor determining ride comfort is the ratio of the unsprung weight, which would be the tires, rims, calipers, rotors, A-arms, etc., and the sprung weight (the weight of everything but the unsprung weight). The programming of the magnetic ride control (MRC) system would seem to have assumptions regarding the unsprung weight, and seemingly would apply excessive damping to the lighter weight of regular (i.e., not run-flat) tires, with drilled/slotted rotors, etc. It takes more damping to stop a heavier unsprung weight, moving at the same vertical velocity. If so, this could lead one to surmise that the ride with regular tires would be likely be
harsher than for the run-flats, because of the magnetic ride control getting spoofed by the lighter unsprung weight. However, folks have commented that the XLR ride actually is
better with the regular tires. I'm not a control system expert, for sure, but I can't help but wonder what the MRC control logic includes. Could it be heuristic, and therefore, self-calibrating? ("Curiouser and curiouser...")
Has anyone ever measured the difference in weight of a "stock" setup (rim/tire/rotor/caliper) vs. a high-performance one?
Tim