The lowered weight reduces the model's rolling resistance, which determines how much energy the vehicle will use up to maintain the tire's motion. The lower the rolling resistance, the less energy the vehicle needs. The reduced rolling resistance decreases the vehicle's fuel consumption and CO2 emissions, making the tire more cost and fuel efficient. The lightweight belt cord also improves the steering responsiveness, as it makes the steering quicker and more precise, which allows the driver to confidently control the tire in all conditions.