When I hit 110 kph, i get a pretty bad shake in the steering wheel/front end.
Camber adjustment? Check.
Alignment? Check.
Wheels balanced? Check.
Replaced sketchy passengers axle? Check.

Wtf else could cause this? (drivers axle seems fine).

 

Make sure one of your calipers isn't seized...though this usually causes vibration at lower speed.

Get the brakes nice and hot...(a regular 15-20 min drive is ok, no need to burn them), remove the wheels and gently pry the calipers open (don't damage the discs or pads).

They should move freely.

Remember to pump your brakes before driving again!

 

Good info, but i did just bleed the brakes a little while ago and they seemed not to be siezed... but I'll check anyway. Other possible culprits?