Rear Rotors already need replacing?

[theweekendrider]

I recently added BF Goodrich Rugged Terrain T/A's to my Ram and felt a shimmy in the rear after a few off road trips. I took it to a local shop and while they found the wheels out of balance he noted the rear rotors need replacing since they are warped. The truck is not even a year old. Anyone else hear of or experience it?

 

[Andy578]

happened on my car but it was the front. no idea what caused it tho

 

[loveracing1988]

How many miles are on the truck? Ford and Gm cover warped rotors out to 3 years or 36000 miles, so I would assume Chrysler is thr same. If not if you are under 1 year 12000 miles you are covered anyways.

 

[VectorZ]

Are the tires the same size as stock?