Okay, what else can cause loud vibrating noise from the front wheels?

I just replaced tyres. I just had the wheels balanced. Rims straight. Tyres inflated properly and worn even.


Have questions, do Yokohama's run wider than other wheels? I am currently running 235/40-17 on stock rims and suspension. The only last thing I can think of is that maybe the wheels are rubbing against the uprights? When the wheels are off, there are some black smudge marks on them, but not sure if its the constant rubbing or just very hard cornering.

The loud vibrating noise is constant, gets louder the faster I go. It slightly goes away when I am turning left, but still there when I am turning right.

against some suspension components, because the stock S4 rims have pretty large offset.

One more comment: looking at tire manufacturer's specs, a 235/40/17 tire requires a rim that is at least 8" wide. Your S4 rims are only 7.5" wide. This probably has nothing to do with your vibration problem though. I just point it out because it may be unsafe.