Shaking @ around 85 mph and above

[Bo525i]

Seat shake, I have a feeling its sh**ty balancing.. Am I on the right track?

[e34.535i.sport]

I should be the shale guru by now the amount I've had! LOL!

Is it thru the wheel too?

If it's just in your seat something's amiss in the rear end, if you can feel it in the steering wheel it's front end (or maybe both?)

A wheel out of balance can cause a hell of a shake so definitely worth a check... It's sorted my shakes out before today.

[Bo525i]

No real shakes @ the steering wheel, come to think of it I think my
rear left rotor is shot!

[e34.535i.sport]

No real shakes @ the steering wheel, come to think of it I think my
rear left rotor is shot!

Does it happen/worsen when braking? If so you have found your culprit!

[632 Regal]

out of round tired show their face above 70 MPH usually, no shake below is a dead ringer for bad tire/s

[Bo525i]

Could be that too even tho they´re almost brand new wintertires

[632 Regal]

When I first got a new set of tires I went back to the place like a hundred times, swapped out the tires for different brand (more $$$) and still 2 tires were visibly out of round when they balanced them. I bitched enough and they replaced one of them but still had the high speed vibration until I got some really cheap winter tires... smooth as glass. Tire place eventually told me it was my car, early in the process the entire front end was replaced so that kinda pissed me off. Discount tire absolutely SUCKS!

[Bo525i]

Hmmmm I did buy them thru a german discount store.. Guess I´ll wait and see how things are when I put the summers back on in 2 weeks!

Thanks for your input all!