This work presents the design and fabrication of a passive suspension system based on 3D-printed compliant wheels for a four-wheeled research mobile robot. The solution employs cellular geometries - honeycomb cores, radial struts, circular perforations and vortex-slot groovescombined with flexible elastomers (TPU 95A and flexible SLA photopolymer resin), enabling impact absorption without active actuators.The study encompassed material selection and additive-manufacturing parameter optimization, finite-element analyses to predict deformation under load, and bench-top tests comparing the new wheels with conventional rigid configurations. Results showed a significant reduction in peak vertical accelerations and sustained wheel-ground contact, leading to greater stability and lower energy consumption. The bio-inspired cellular design combined with 3D-printed elastomers thus offers a lightweight, cost-effective and low-maintenance alternative for research robotic platforms operating on uneven terrain.