This is more of an alignment and lack of rotation concern that causing cupping of tires. Standard intervals for rotation of tires should be every other oil change. At 130k it wouldn't hurt to get an alignment performed, if rear suspension components do not hold a true alignment, then yes you may have components to replace. It is worth investing in an alignment.
〉 Answered on Oct 31st, 2007 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions
According to my Porsche technician this is VERY common and an alignment is necessary and will make a huge difference.
〉 Answered on Oct 31st, 2007 by Kim Walker, Marketing Director at Peak Automotive
The first thing I would check would be the tire pressure. Overinflating and underinflating could cause this issue. Check the plaque or sticker inside the driver
〉 Answered on Oct 31st, 2007 by Suzanne Grego, Technician at City of Philadelphia Fleet Management