Uneven application of braking power at high speeds, caused by the heat that is made between the rotor and the brake pad; this is causing uneven stresses in the rotor. Such heavy brake usage aggravates the situation by providing uneven wearing along the circumference of the braking surface.
However, other possibilities would exist with loosened suspension; could possibly be loose lock nut on wheel bearing axle or worn ball joints or last but not least warped rotors that need to be inspected and or resurfaced .roters need turned. 65;
Get you front end aligned, that should take care of the shakes.
Your rotors are probably warped from getting hot during braking and need to be "turned" or replaced. I suggest you take it to a brake shop or dealer.
It is likely a brake rotor has to much run out (warped). There could also be some problem with steering or suspension components.
You need the front rotors machined or replaced.
if it shakes while your braking your front roters could be warped or if it shakes while your driving try balancing the tires at a tire shop.
the brake rotors are warped. resurface or replace rotors. if the vehicle shakes without applying the brakes, check tire balance.
Shaking when accelerating and braking show a front end issue. Check the lug nuts to make sure your tires are bolted on tight. Check for play in front end components, like the wheel bearings and tie rod ends. While possibly causing the vibration, the front brakes usually only cause a shake when braking.
front end is worn out
warped rotor
There could be a bad wheel bearing or worn front end components. Check the tie rod ends and ball joints for wear.
Warped rotors