The first article describes a fairly simple conclusion for practical application of the dependence of the free radius of the wheel with an elastic tire on the internal pressure of the air using the positions of the rubber cord shell theory developed by prof. In. L. Biederman . The second article proposes a way of applying the continuity of the mechanics of continuous environments of the kinematics of rolling wheel with elastic tire. Its purpose is to obtain, on the basis of the simplest assumptions, an equation linking the radiusing of the driven wheel with the load parameters of the bus. The third article contains a summary of the results of the experimental verification of the main ratios obtained in the first two articles . It provides a method for processing experimental data for the accumulation ofquantitative information on the coupling constants between the rolling radius of the driven wheel, the free radius of the tire, the internal air pressure and the normal load. All three articles are exploratory in nature and are aimed at obtaining auxiliary analytical and experimental material necessary for kinematic and power analysis of the multi-wheel drive vehicle.