tires not balanced?
keep in mind, 18s are 10x more sensitive & ride rougher than 16s... goodluck
My original rims were 17's. i just bought some 18 amg monoblocks(used). but rims are in great conditions. i bought it off a friend, and i bought brand new tires. i got it mounted and balanced also. it's fine driving on normal roads, but when i take it on the highway, go about 70mph, i can feel it shaking. what do you think it is?
ProV is correct: get them Road Force balanced. As you move to larger yet lower profile tires the balance is absolutely critical and R/F is the best technology we have for that.
Take care and enjoy the smoother ride,
Greg
__________________ If the only prayer you say in your life is thank you, that would suffice. Meister Eckhart
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I had similar issue, it use to vibrate 70~110mph and will be okay after & before that speed. All I had to do is go the local tyre shop for finish balancing or road force balancing.
I'm attaching the pix when I went for the job.
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I've read that the torque on the lug nuts can be pretty critical too. Also, are you sure you have the correct bolts? Those are apparently wheel-specific, as opposed to car specific.
You might also try posting this on the Tire Rack's Tire, Wheel, Brake & Suspension forum too; it's under the Technical Forum sub-heading.
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Vibration on 01 E430 Just Installed 18 AMG's 
Linear Mode
