Today on our 2012 Nissan Altima well be test fitting the Yakima Doubledown Ace four bike carrier for inch and a quarter and two inch hitches, part number Y02451. A quick note about this bike rack, when using in an inch and a quarter Class I hitch you are limited to two bikes. To begin our test fit weve already gone ahead and removed the two inch adapter from the bike rack shank, so well slide… see more >