X1 framework CNC-machined from 2mm premium Swiss 7075 T6 aluminum not to mention black colored coated. Designed & developed to boost traction, stability, and steering in certain conditions. The aluminum framework provides better control and makes the vehicle better to drive. Suitable for high and very-high traction songs. 24mm narrower than previous chassis versions, eliminating contact with the track in corners while rolling, and providing enhanced cornering rate. Includes a slot for a composite battery backstop allowing 5mm battery pack position adjustment with all the most regularly used cross-chassis alignment configuration. For use with #371148 aluminum back pod dish.