The driveshaft is a core component of a vehicle’s power transmission system. Traditional steel driveshafts, while strong, are also heavy, impacting fuel efficiency and power response. Carbon fiber driveshafts, with their superior strength-to-weight ratio and fatigue resistance, are becoming the preferred choice for high-performance vehicles, racing cars, and new energy vehicles.
Carbon fiber driveshafts are gradually replacing traditional steel driveshafts due to their superior strength-to-weight ratio and lightweight properties. Data shows that they weigh only 3-6 kg, 50%-70% less than steel components (10-15 kg). For example, the carbon fiber driveshaft in the BMW M4 sheds 5 kg, reducing rotational inertia and improving acceleration response。
In terms of performance, carbon fiber boasts a tensile strength of 500-700 MPa, a specific stiffness 3-5 times that of steel, and the ability to withstand ultra-high torque. It also offers superior fatigue resistance, with a lifespan exceeding 100,000 kilometers, far exceeding the 50,000-80,000 kilometers of steel. Furthermore, weight reduction can reduce power loss by 3%-5%, increasing electric vehicle range by 1%-2%.
Currently, the cost of carbon fiber drive shafts is relatively high, but with scaled production, costs are expected to drop by 30%-50% in the future. As material technology advances, carbon fiber drive shafts will become a core component for high-performance and new energy vehicles.