XP10 carbon Front Brace helps to adjust the front suspensions flex setting. Soft - the carbon brace is not mounted to the front carbon arm - This option makes the car initially less responsive but will provide more mechanical grip. Best suited for low grip carpet conditions and asphalt. Medium - the carbon brace is mounted to the front carbon brace by small posts that raise the brace and makes the front suspension stiffer - Gives a good balance between initial response and mechanical grip. Best option for most conditions. Stiff - the carbon brace is directly attached to the front carbon arm - Makes the car the most responsive, but also takes away a bit of mechanical grip. Best suited for high bite conditions. CNC-machined from 2.5mm high-grade carbon material.