noise on 5th gear pass 65mph

eclipse 01 gt. problem- weird noise every 2 sec delay on highway at 5th gear. my car runs normal in street.people have told me that it might be the hub bearing and some have said its my tires. don't know what to do. my tires are partially bald all 4. its 225 40 r17 with aftermarket rims. i already put new brake pads and fixed the rotors. but when im on 5th gear on a highway i hear weird humming noise and i feel the vibration under my seat and passenger seat. can any one tell me what is happening. i think its my tires and i have already ordered new tires and will be putting it on pretty soon. what if this does not resolve my issue! what actions should i take?

i happen to believe its a flat spot on one ofyour tires

the sound is from your tires being worn and the vibration is from your rear tires having flat spots. i just went through this. when i replaced the tires, the sound and vibration went away

steering wheel vibration = front tires
seats/interior vibration = rear tires

thanx guys apreciate ur help will update u guys when i put on the new tires. thanx again