Abstract: A vehicle having a profiled tread, having tread blocks (1) in at least some regions of its circumference, characterized in that for at least some of the tread blocks (1) at least the tread block edges (2) running into the tire contact patch (11) and extending at an angle to the central plane of the tire are lowered over their entire length with respect to the central plateau (3) of the respective tread block (1).

Abstract: A vehicle having a profiled tread, having tread blocks (1) in at least some regions of its circumference, characterized in that for at least some of the tread blocks (1) at least the tread block edges (2) running into the tire contact patch (11) and extending at an angle to the central plane of the tire are lowered over their entire length with respect to the central plateau (3) of the respective tread block (1).

Abstract: A tool, mainly for placing by remote-control a tensioning roller chain or a like tightening element around a flange, in particular in nuclear works, and thereupon to carry out tightening, the ends of the tensioning roller chain being connected by a tensioning system including a tightening bolt, characterized by gripper members to seize the ends of the tensioning roller chain and by gripper arms on which the gripper members are mounted and of which at least one arm is kinematically displaceable by a displacement system in such a manner that the ends of the tensioning roller chain can be guided around the flange and toward each other, and by a coupling at one of the gripper arms for detachably engaging the tightening bolt so that a tensioning motor may drive the coupling and thereby tighten the roller chain about the flange and so that the gripper arms may thereupon disengage from the coupling and the roller chain remain tightened about the flange.