Possible Samson Tire Issues, Maybe Not Worth The Savings

Not sure your humming noise should be coming from those tires. I replaced mine this year with success. They ride just slightly harder than my Goodyears that I replaced, but I also replaced them with a little heavier duty sidewall Samson tire. I am not getting any strange humming noises. Are you sure the noise is not coming from the rear end? Check to make sure you do not have any brake calipers that have locked up on you too.