The upside of stuffing big wheels under the bed of your truck is how cool it looks. The downside to this mod is how much cutting you must do in order to make massive rollers fit. The amount of sheetmetal that gets removed depends on the model of truck you're working on. What doesn't change is the fact that once you cut out a sizeable portion of your truck's bed to make room for all of that rubber, you invite dirt and road grime in as well. The solution is to tub the bed, which sounds easy, and it is-if you know what you're doing. There are a lot of pre-made wheeltubs that you can trim to fit that will do the job. We are going to show you how to build your own set of tubs that will do the same job while looking much better than those prefab tubs.