Today on our 2009 Nissan Altima, well be test fitting the Yakima Doubledown Ace four bike carrier for 1-1/4 and 2 hitches, part number y02451. To begin our test fit well slide the shank of the carrier into the receiver tube of our hitch, line up the hitch pin hole, and put in our clip with the red knob on it. Now move to the rear of the carrier, where well hand tighten the black knob to engage our… see more >