T4'21 Aluminum Flex Chassis would work for typical carpeting tracks and high traction asphalt songs. T4'21 framework redesigned to utilize the T4'21 engine mount, T-brace and features holes for centering pins for RF suspension blocks. The holes for quick arms mounting system are removed for enhanced durability associated with the framework. Retained from the previous year, the mid engine chassis layout is made to accommodate center drivetrain system as well as the narrow mounts the long arm suspension. The updated layout moves the key bulkheads towards the center by 1mm, and includes mounting holes for both the long arm and short arm suspension system holders allowing switching involving the two designs utilising the exact same framework. The 2.0mm dense aluminum flex chassis is CNC-machined from premium Swiss 7075 T6 aluminum, then black coated and laser etched. The ultra-narrow chassis is 84mm wide and features unique cut outs that offer the framework flex characteristics suited to a multitude of the traction levels. The bottom of the framework is shaped to cut back contact between the chassis as well as the ground while turning to improve cornering speed.
