Brief XB2 2.0mm thick aluminum framework works for tracks in which more security is necessary. Recommended for medium to high traction songs. The 1-piece framework design with extra flex attribute produces more general traction and improves steering. Features extra 4 holes to put in additional stiffener to cut back laterally framework flex. This improve rotation and accuracy on more impressive range. CNC-machined from top-notch Swiss 2.0mm 7075 T6 aluminum.