The aluminum back suspension system holders are installed with 2 larger screws rather than 4 smaller screws for improved reliability. The holders cheapest position is 1mm lower than past models to help produce more traction whenever needed. The �23 framework provides extra approval for this lower position. The rear wheelbase setting is modified by moving top of the and lower arms across the longer suspension system holder pins. CNC-machined from top-notch Swiss 7075 T6 aluminum. Ebony coated.