5.0 w/20\'s front end wander

[RPM2]

My X6 5.0 with Performance Upgrade is a handful to keep centered when driving down anything but perfect roads. I've checked tire pressures and have never hit a pot hole. Any undulation in the road grabs the tires and pulls the vehicle. Anyone else dealing with this?

[Jazzman]

That's typical of 20's, and is normal. It's called tracking, and especially noticeable during braking (due to relative increased tire grip caused by shift in vehicle's weight), so make sure to have a firm grip.

I assume it gets worse the bigger the wheel. We have 18s, 19s, and 20s between our two X5s. It's not really noticeable with the 18s. We haven't had the vehicle with the 19s long enough for me to comment, however.

[coodem]

Known as tram lining, usually worse on runflats, due to stiff sidewalls

[BigBobDeuce]

My x50i with 20" wheels does it as well. I also have Active Steering, which I think makes it a little worse than "normal," too.

[DarienJim]

I notice that going down I-95 in the center lane (the one the semi trucks all use) where there is noticeable indentations in the asphalt due to truck weight, I do see the car moving all around the road.

[aas5]

I had the same experience on the 19s on Infiniti M45 and didn't particularly enjoy the experience. Kind of weird and feels like the road feedback I ca=ould definitely live without.

[newdadkel]

Yes the run-flats are terrible for this tracking. Since they are so stiff, there is very little give. Bumps in the road are also felt much more as well.