HEAT oven to 350º F.
PLACE ribs, meat sides up, in single layer on 2 foil-covered rimmed baking sheets sprayed with cooking spray. Sprinkle with Dry Rubs; rub into meat. Cover.
BAKE 1 hour. Brush with about 1/4 of the barbecue sauce. Bake, uncovered, 1 hour or until ribs are tender, turning and brushing with remaining barbecue sauce every 15 min.