An axle/suspension system including a pair of suspension assemblies (140;240) for a heavy-duty vehicle, each of the suspension assemblies being supportable by and connectable to a frame (122;222) of the heavy-duty vehicle, the axle/suspension system including an axle (162;262), the axle/suspension system comprising: a hanger (142;242) connectable to the frame (122; 222) of the heavy-duty vehicle; a beam (144;244) mounted at a pivot connection to the hanger (142; 242) for relative pivotal movement, the pivot connection having an axis of rotation, a portion of the axle (162; 262) being attachable to the beam (144; 244) on a first side of the pivot connection; and a bumper structure (182;282) fixed to the beam (144;244) on an opposite, second side of the pivot connection, the bumper structure (182;282) being for contacting a component (186;286) associated with the frame (122; 222) or hanger (142; 242) to limit pivotal movement of the axle (162; 262) in one direction about the pivot connection, wherein said contacting applies a force (F2;F4) to the pivot connection in a force application direction (D;D1) that is angularly spaced from horizontal and vertical planes (H,V) extending through the axis of rotation; and wherein the pivot connection including a bushing (150;250), the bushing including an elastomeric bushing body with at least one void extending axially for decreasing rigidity of the bushing body in the vertical plane, wherein the at least one void is entirely located in the bushing body angularly spaced from the force application direction (D;D1) and substantially offset in a forward direction from the vertical plane, and wherein the bushing body is substantially solid along the force application direction (D;D1) and in a rearward direction from the vertical plane. a hanger (142;242) connectable to the frame (122; 222) of the heavy-duty vehicle; a beam (144;244) mounted at a pivot connection to the hanger (142; 242) for relative pivotal movement, the pivot connection having an axis of rotation, a portion of the axle (162; 262) being attachable to the beam (144; 244) on a first side of the pivot connection; and a bumper structure (182;282) fixed to the beam (144;244) on an opposite, second side of the pivot connection, the bumper structure (182;282) being for contacting a component (186;286) associated with the frame (122; 222) or hanger (142; 242) to limit pivotal movement of the axle (162; 262) in one direction about the pivot connection, wherein said contacting applies a force (F2;F4) to the pivot connection in a force application direction (D;D1) that is angularly spaced from horizontal and vertical planes (H,V) extending through the axis of rotation; and wherein the pivot connection including a bushing (150;250), the bushing including an elastomeric bushing body with at least one void extending axially for decreasing rigidity of the bushing body in the vertical plane, wherein the at least one void is entirely located in the bushing body angularly spaced from the force application direction (D;D1) and substantially offset in a forward direction from the vertical plane, and wherein the bushing body is substantially solid along the force application direction (D;D1) and in a rearward direction from the vertical plane.