Just a guess, but perhaps a wheel bearing. Also a guess but because it starts at reasonable speed perhaps a rear wheel. Does the tone change when going over bump (or rise that flexs suspwnsion) or perhaps turning?
He has a new set of tires...might be too late to check the old ones.Old Lar said:Check the tires and tire tread to see if the tread is scalloped..worn unevenly. If they are worn from some suspension issues, they can make the noise you describe.