The MRX and RRX models from Rieju were some of the first on the drawing board in the 50ccm enduro class and thus paved the way for the newer 50ccm models from Rieju.
Rieju MRX and RRX are with AM6 engine and large rims, 18 "and 21" respectively rear and front and are clearly enduro oriented which means that comfort and side position are good and therefore you can roll long trips on your MRX and RRX machine, no matter the terrain.