Since I'm new to the Focus ST I wanted to ask about this before I freak out and run to the stealership for no reason. I've been noticing my car making a rumbling sound with some vibrations once I'm up past 50mph. I really noticed it Monday driving 4.5 hours home down I40. It sounds like it's coming from the rear but I can't be certain. Then again it felt like it was in the front based on the steering wheel wiggling. The car only has 26xx miles on it. Is this normal with the low profile tires maybe?? Anyone else have this sort of issue before?