I think I've heard the speed is 25mph. Recently a new car to me was calibrated with INPA and I drove out my neighborhood to test only to have the car bottom out after I reached 25, locking a front wheel and blowing the front right CV clean apart. I was surprised that even if there's a ride height sensor problem the car would be able to bottom out like that. At this point I suspect the PO/Dealer did strut work and did not replace the bump stops. Check for these and be careful!