Off road tires on jeep wrangler, wierd humming noise when going above 35?

i just got my first car and whenever i accelerate above 35mph i hear a humming noise coming from the front tires, my parents say its because i have off road tires on the jeep but i think its something else. the noise doesnt stop if my foots off the gas as long as im going over 35 and the sound increases as i go faster.
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