[en] The results on measuring radial displacements in superconducting (SC) dipoles DB-1 and DB-1-2 caused by electromagnetic forces and the methods used have been described. The data are compared with calculations made with ''STRESS'' program for an elastic element of the displacement pick up, for short collar units of different rigidity and for the dipoles mentioned above. The contribution from SC winding shift to the field nonlinearity has been estimated. It is shown that SP coil deforms into elliptical one under effect of electromagnetic forces. This deformation brings the nonlinearity of the field. The main contribution to the field nonlinearity brings the field sextupole component. This field nonlinearity is equal to 10^-4 (at 5T magnetic field in the center of dipole and radial displacement of 80 μm)