A castor wheel support for a towed agricultural implement having a frame positioned parallel to the soil over which the implement is towed. Parallel links interconnect the castor support with the frame. The castor support has a spindle with a longitudinal axis A for supporting a castor mounting structure for pivoting movement. The castor mounting structure supports an axle hub assembly and a wheel. The axis A of the spindle is angled forward 3 degrees to minimize wobbling.
