Abstract: A mechanism for mounting the front fender for an agricultural tractor wherein the support structure includes an arcuate mounting bracket connected to the front wheel to be pivotally moveable therewith, an arcuate support bracket detachably connected to the mounting bracket and slidable over top thereof, and a stanchion interconnecting the support bracket and the fender to locate the fender adjacent the circumference of the front tire. The mounting bracket is provided with a plurality of slotted openings alignable with holes in the support bracket to permit fasteners to extend therethrough for detachably connecting the support bracket to the mounting bracket. Both the mounting bracket and support bracket have a center of curvature coinciding with the axis of rotation of the corresponding tire such that a slidable movement of the support bracket over the surface of the mounting bracket can adjustably position the fender around the circumference of the corresponding tire.