knocking caused by alloy wheel

[Cornes182Cup]

The knocking noise follows the alloy wheel, if its on the front the knock happens at the front and then moves to the back if I put the alloy on the back.

Alloys are 2118s, and I just can't figure out why its doing this as they are only about 6 months old and I always avoid potholes so they aren't buckled, anyone got any ideas why its happening?

 

[Knuckles]

Have you tightened them up properly?

Is the face that bolts on to the hub flat?

 

[Cornes182Cup]

I've had this problem for months, must have been on and off the car atleast 40 times trying to solve it, tightened up at different levels and always knocks no matter how tight the bolts are.

As far as I can tell the face is flat, nothing obviously wrong.

It only knocks when driving over a bumpy roads if that's any help

 

[Knuckles]

No idea if it follows the wheel around :/

 

[lemonnobby]

what about if you take it off and shake the wheel anything inside the tyre?
wheel weights clear of brakes?