Is it an RC, AC or DC Tundra?? I have the RC w/the 8' bed and fits in there with about 8-10" of space in the front to keep it from smashing the rear window and about 12-16" from the back tires to the closed tailgate. If you got the AC, then you might need to keep the tailgate open. My buddy has an '06 Ram DC and his foreman 450 doesn't fit due to his bigger tires but if they were stock tires, i think he could close the tailgate.