I assume my rotors are warped as I get a lot of shudder in my steering wheel and car when braking between 45 and 60 mph. I don't feel it when cruising or accelerating so I doubt it's the tires being out of balance. With 11k miles, will the dealer warranty them? Other manufacturers seem to only warranty them for the first 10k miles. What is a good option for replacement if they don't?