A bias tire consists of multiple rubber plies over lapping each other. The crown and sidewalls are interdependent.The overlapped plies form a thick layer that is less flexible and more sensitive to overheating. Due to their lower cost compared to radial tires, they are more commonly used by trailer manufacturers.
Bias tire sidewall flex is transmitted to the tread. The footprint deforms and there is an increase in tire slip.
The tire does not contact as much ground as a radial tire, leading to a loss of engine power transmission and greater ground damage.