Optional 3.0mm thick high-quality CNC-machined graphite chassis for XRAY T1FKâ™05. This chassis is 0.5mm thicker than the standard #301112 T1FKâ™05 chassis, allowing for an overall stiffer chassis; recommended for a high grip conditions such as foam carpet racing. Precision machining on the upper surface allows components to sit at standard height, and milled battery slots allow batteries to sit deeper into chassis for a lower CG. Includes composite bearing holder.