TY CONF TI THE EFFECT OF STIFFNESS PARAMETERS OF VARIOUS TIRES ON IMPROVING THE SMOOTH RUNNING OF THE URALETS-254 MINI TRACTOR KW smooth running KW tire stiffness KW minitractor KW elastic properties KW tire air pressure JO AUTOMOTIVE AND TRACTOR ENGINEERING IN RUSSIA: WAYS OF DEVELOPMENT AND PERSONNEL TRAINING AU Muratkin, S.E. AU Tatarincev, V.Y. AU Artyomov, A.V. AU Koljadin, P.A. AU Pryadkin, V.I. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov