Brief XB2 2.0mm thick aluminum framework works for tracks in which more security is required. Suggested for medium to high traction songs. The 1-piece framework design with additional flex attribute creates more overall traction and improves steering. Features additional 4 holes to put in additional stiffener to reduce sideways chassis flex. This improve rotation and precision on higher level. CNC-machined from top-notch Swiss 2.0mm 7075 T6 aluminum.