“Rollers” are a unique vehicle attachment which can be found on the “Road Roller” vehicle and probably crafted at high mechanic levels. Tracks are what you find on tanks and bulldozers. They have a much higher durability than wheels and won’t fall off if you hit a sink hole.They are also very heavy, but there’s also a lighter rubber track variant but it’s harder to find.
I haven’t tried them yet, but If your note is to be believed then rollers sure sound like the way to go for your finished end-game deathmobile, over tracks and armored wheels.
My general advice; start from scratch. Think about what your completed deathmobile will look like and start by building basically just the cockpit portion. This way you can get a functional “mini-deathmobile” up and running as quickly as possible, and you don’t have to worry about the massive amount of material required for a full-scale project.
Here’s a shot of my finished cockpit portion;
First row is spiked rams, then steel plated heavy duty frames, then more HDF with the reinforced windshield and headlight and armored front wheels, then the driver seat with mounted m249 and floor trunks on either side, then a passenger seat and rear armored tires, and three rear trunks.
Be sure to use all heavy duty frames for the front portion if you want to do any zombie ramming. Armored wheels, armor plating and reinforced headlights and windshields are also a must.
A diesel engine is probably a bad idea early game as diesel can be much harder to find.