Have been a Volvo fan for 20+ years and have had great luck with pre-SPA cars. Currently in a 2019 XC60 that has had highway vibrations since new (T6 21"). Feels like a wheel is off balance with a strong feeling of vibration at speeds above 60mph (vibration gets worse the faster I go) mainly in the steering wheel but can be felt in the floor and seat as well. It's extremely tiring on long trips; I bought the XC60 for a weekly 300mi+ drive round trip. Has been back to the dealer 5 times and they have tried changing tires, balancing, etc.
I've had 2 XC90 loaners - no vibrations and great on highway.
A V60 - slight vibration, not as bad as mine but still annoying
An XC60 - wheel obviously off balance. Thumping between 65-72MPH 20"
Another XC60 on 19". This one vibrates worse than mine.
Is this just a characteristic of the car? At this point I'm ready to just trade it in for an X3 or X5. Volvo corporate has been no help. Can't believe this car was north of $60k and drives worse than my 2009 VW on the highway.