There are two, front under side lounge and rear under bed. We removed the front lounge to install recliner chairs, side table and inside storage cabinet, but the rear compartment is 30" deep x 15" high x 50" wide. It is accessible from the outside hatch or inside by lifting the bed.
Doug and Cheryl
2012 FC RB, Michelin 16, ProPride 1400
2016 Ram 1500 Laramie Crew Cab 4X4 Ecodiesel 3.92 axles
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