Ford even engineered special «stiff» front wheel bearings to combat caliper -
piston knockback, the bane of road - race brakes, in severe use.
The stiffer front wheel bearings are said to reduce caliper
knockback, a condition where deflection in the wheel bearings allow the brake rotors to push the brake pads into the caliper
pistons, and back into their bores creating a «
knockback» sensation.