Originally Posted by Dino_D

You have to get the Type B dimec (med flex) or Type B dimec20 chassis (hard) which is a direct bolt onto the v2 car. I use the Dimec outdoors on low to med grip tracks, and Dimec20 on very hot days or high grip tracks. I prefer the flex of the plastic when running outdoors. Its more forgiving and easier to drive.

I only use the aluminum chassis in mid motor high grip situations.