I have a 18 raptor - have 37x20x12.5 toyo mountain terrains on it. Wheels are Fuel Sledge 20x9. Backspacing is 5in adn offset is 1. Putting Deberti fenders and bed sides on it which adds 3 inches on each side. My questions is this - i dont want to buy new tires and wheels, but dont want tires to sit way inside fenders. Are 3 in wheel spacers the way to go? This is a daily drive, VERY light offroad use