Front end noise

my 1989 camry makes a rotational noise(sounds like an out of round wheel) up front, but not all the time(it does it especially when cold) ive changed the axles, tie rod ends, etc-any ideas?

Tire flat spots ?
Some rubber compounds are more susceptible to temperature deformation. i.e. When parked after driving tires are warm, then they sit in one spot and cool down leaving that temporary flat spot until they warm again while driving.