Tires are 315/70r17 Falken Rubitreks, I think. About 34.5" tall.
I have the Yakima Overhaul rack, I think. It's remarkably stout. I use it for transporting my canoes, primarily. Lower options are available in the same product line for rooftop tents and the like.
What overlanding gear are you looking for that won't work on a regular cab? I have some Husky tubs from Home Depot to put my camping gear in. Done-zo...
Let the Tacoma bros clutter up the exterior of their trucks with maxtrax and rotopax. 99.9% of that stuff will never see any use. It's peacock...