: In the gaming community, mx.rar files are frequently shared on forums as compressed mods, tracks, or skins for motocross simulators like MX Bikes or MX vs. ATV .
: It may contain .mx files, which are serialized Mathematica expressions used for high-performance computing and fast loading of datasets. Technical Performance of RAR Archives mx.rar
If you are reviewing the itself as a way to package "MX" data: MX Tools revisited - A Swiss Army knife of penguins : In the gaming community, mx