The technique of the analysis of a degree of influence of separate elements of a tubular bearing structure of the buggy vehicle on parameters of its stress-strain condition is studied in the paper. As parameters of the stress-strain state the angle of twisting of the frame around the longitudinal axis of symmetry, as well as the stress in the front upper corners of the cockpit (the subconstruction where the racer is located), were selected. The considered method is based on the regression analysis, with the help of which the equations for calculating the above values were obtained. Due to the volume of data and the associated difficulties with subsequent analysis, the given equations are proposed to be used only for the most important elements of the individual frame sub-structures from the point of view of the engineer. The definition of such elements can depend on the experience of the engineer, his intuition, and also on the basis of the previously accumulated third-party information. The object of the study is the frame of the “buggy” cross-country vehicle used for movement on rough terrain, in particular, in forestry by huntsmen. The calculations were carried out in the SolidWorks computer simulation program using the finite element method.