Tread style choices are: none, cross, o-rings, v-grooves, squares, spheres, cylindersX, cylindersY, cylindersZ, spikes, slots, x, zigX, v

Spoke Styles: Biohazard (set# of spokes to 3 to mimic logo), circle, circlefit, diamond, fill, line, none, rectangle, spiral

Quality Parameters: Basically any number that divides evenly into 360. For a larger wheel diameter you should use a larger number.