Today on our 2010 Scion XB, well be test fitting the Yakima Double Down Ace four bike carrier for inch and a quarter and two inch hitches, part number y02451. A quick note on this bike rack, it will work in both inch and a quarter and two inch hitches, however, when using a class I hitch you are limited to two bikes. Now weve already gone ahead and removed our two inch adapter, so well slide our… see more >