CURT 17500 TruTrack Trunnion Bar Weight Distribution Hitch with Sway Control, Up to 10,000 lbs., 2 Inch Shank, 2 5 16 Inch Ball Solar Provides a buffer between a Hub Face Length (Inches):89 Provides a buffer between a 5th wheel hitch head plate and kingpin pin box Reduces normal wear and tear when towing Eliminates messy grease deposits on hitch head plate Easily fits on any standard kingpin Constructed from tough polyethylene this WD replacement shank is perfect for a variety of tough jobs and long journeys the CURT TruTrack is an advanced WD system that integrates the sway control function into the design of the hitch the TruTrack employs interlocking nuts and six preset holes to provide specific angles of tilt and a simpler adjustment method