Mid-size XB2 2.0mm dense aluminum framework works for tracks which more traction is a must. Ideal for low to moderate traction tracks. The 1-piece framework design with an increase of flex feature creates more basic traction and improves steering. Suited to low to moderate traction. Features additional 4 holes to install additional stiffener to reduce laterally framework flex. This improve rotation and accuracy on high level. CNC-machined from top-quality Swiss 2.0mm 7075 T6 aluminum.