2008 550i is driving loose???

[chris25n]

I put new tires on my car (not from Dealer) but a nice tire place and since then the car is driving very loose at high speeds >70mph. It feels like the car is moving all over the road from the back tires (the ones replaced). I thought it was air pressure or the new tires not having time to get broke in, but i have messed with the pressure and have over 1000 miles and still the same???? I have appt with BMW dealer tomorrow for normal oil change and will have them check it out, but wanted someone’s opinion on what it could be beforehand. Alignment? Suspension? I just don't know.

Thanks for anyone’s help.
Chris

[E36Shikara]

Do these tires have a brand name and model associated with them?

[chris25n]

Yes they are Nitto's NT555, i think, don't have the car today at work, but they are the same size as the stocks. I hope this helps answer your question.

Chris

[Spyglass]

Chris, did you change all four tires or do you still have the OEM Conti's on the front?

[Gary@Tirerack]

Chris, did you change all four tires or do you still have the OEM Conti's on the front?

Good question. Mixing tire types can make a car feel loose.