The 2006 Dodge Ram Mega Cab boasts the largest truck interior in its class. With 72.2 cubic feet of rear cargo space with the back seats folded flat, the Mega Cab provides more enclosed storage area than some SUVs. Although front passengers benefit from the Mega Cab’s increased interior size, it’s the back seat passengers that really reap the rewards. With 44.2 inches of rear legroom, the Mega Cab has more stretch-out space than a Maybach ultra-luxury sedan.