I would recommend both based on personal experience (with and without them on two motorhomes), but like anything else it depends on your own situation and comfort. I would suggest watching the videos on the Saf-T-Plus website regarding what happens when tires blow out and how steering stabilizers help. I can tell you that the handling of our 36’ Storm is excellent now. We just spent a number of weeks in the west on I-40 and can tell you that the wind was horrendous, and while other large motorhomes and some trucks looked like they were being blown around ours was pretty stable. Also helps significantly with passing trucks buffeting the rig. The money spent has saved me tons in worry and ‘white knuckle’ experiences.