I normally only use my Aerowheels for long trips, to get better mileage. But found an issue with them, there are 10 metal clips per hubcap and several of mine just fell out, others seemed to have unclipped but were still in place. Look at your Aerowheels before installing them to ensure these clips are in correctly, if not they feel harder to attach to the wheel and will scratch them. I think this was a poor design on Tesla's part. I'll probably keep them off for good after this trip.