CURT A25 5th Wheel Hitch Head Only, Legs or Roller Required, 25,000 lbs Model 16580CURT A25 5th Wheel Hitch Head Only, Legs or Roller Required, 25,000 lbs Model 16580 The CURT A25 5th wheel hitch offers smoother, quieter towing for your home away from home, combining the patented technology of our A series, an easier mounting system and the power of a 25K 5th wheel hitch. Like our other A series hitches, this 25K 5th wheel hitch uses a patented cast yoke to allow for unimpeded head movement, while providing exceptional stability for