Above you can see a close up on the tires. The red is drybrushed with boltgun metal to give it a worn metal look.
Here are all the tires and treads. Basically everything is basecoated chaos black. The treads and tire rims are undercoated tin bitz. Then the treads are drybrushed boltgun metal. The Tires have the red parts done first in mechrite red then blood red. Boltgun metal is drybrushed over the red and the rims. The tires are then cleaned up with chaos black.
So that is it. Next will be the chassis part that the tires and treads attach to. Hopefully that will be sooner.