Steel rock sliders. Was going to make my own but these were pretty nice. Also built up another cab for smaller tires for the same truck. The large tire version is more competition style. This way, I have the same comp running gear in more of a stock looking body, like a wolf in sheep's clothing. The sliders protect the body some. I did not have these last time and pretty much trashed the body, which is why it is blue now.
The ladder looking rail things
I got them as tight to the body as they can go.
Large tire cab with a pinched nose for big tire clearance. It's a real beast in this mode.
Small tire cab. I bought sheets of styrene, which is solvent weldable with household adhesives such as CA glue, to make the wheel flares with. That material (which the body itself is made of) makes the bodywork/build possibilities pretty much endless.
Always have something to do.