See: PSM

PSM have introduced the new DTC (Delta Traction Characteristics) aluminium chassis designed for Team Associated B74. Machined from high-quality 7075-T6 aluminium, the 2mm thick chassis improves the B74’s performance, especially in medium to low grip track conditions. The DTC chassis features delta shaped pockets to provide soft torsion characteristics along with consistent performance. The soft flex allows your car to generate more mechanical grip, which is very helpful in low grip conditions and/or very tight tracks. PSM’s special coating provides a stealth black look along with super smooth surface finish. An additional PTFE coating for optimized surface gliding characteristics has been applied as well. The chassis also features a unique LCG weight distribution system, which allows you to add up to 24 optional weight inlays (34.00g) to predefined locations with
out modifying the torsional characteristics of the chassis or adding up to its original thickness. Thanks to this you can fine balance your chassis pretty easily.