NHTSA Complaint #11503218 — 2018 VOLVO XC60

Tires are Continental Cross Contact 255/45R20 105H. Miles - 39,000. Severe vibration started coming from rear of car at speeds starting at 45 mph. Alignment was done which did not resolve the issue. Tires removed from rim and two found to be failing inside. The noise reducing foam glued to the inside wall of the tire tread had become almost entirely detached and bunched up in a unsymmetrical configuration. In addition the rubber on the inside where the foam had been was ablating off the surface. This causes a 10oz imbalance in each tire. Additional photos available if requested.