Big wheels are an addon in Spintires and Mudrunner.
Description[]
Big wheels are large, wide, rugged wheels with tractor-like treads. They provide great amounts of traction and excel in offroading, at the expense of high fuel consumption.
In Spintires, this is the default addon of the C-255.
In Mudrunner, it is used by both the C-255 and the C-260, which cannot be changed.