Brief XB2 2.0mm dense aluminum framework works for tracks in which more safety is required. Recommended for medium to high traction tracks. The 1-piece framework design with extra flex attribute creates more general traction and improves steering. Features extra 4 holes to put in extra stiffener to reduce sideways framework flex. This improve rotation and accuracy on more impressive range. CNC-machined from top-notch Swiss 2.0mm 7075 T6 aluminum.