This thesis presents the preliminary design of a mobility system for a pressurized lunar rover. In the context of future long-duration lunar missions, the implementation of a robust and reliable locomotion system is essential to enable the exploration and operations of pressurized rovers across the Moon’s challenging terrain. This work starts with a comprehensive overview of lunar environmental conditions and a comparative analysis of current surface mobility platforms. From this basis, mission requirements are derived in accordance with \ac{ECSS} standards and translated into functional specifications for the mobility subsystem. A terramechanics-based modelling approach is employed to describe the complex interaction between flexible wheels and lunar regolith, considering static and dynamic soil responses.