CURT Replacement TruTrack Weight Distribution Hitch Head Model 17507CURT Replacement TruTrack Weight Distribution Hitch Head Model 17507 While many weight distribution hitches are made to be compatible with a sway control attachment, the CURT TruTrack is an advanced WD system that integrates the sway control function into the design of the hitch. It combines precise weight distributing with integrated sway control to deliver the smoothest, safest ride possible. Setting up the TruTrack WD hitch is faster and easier.