CURT A30 5th Wheel Hitch with Base Rails, 30,000 lbs Model 16191CURT A30 5th Wheel Hitch with Base Rails, 30,000 lbs Model 16191 The CURT A30 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 30K 5th wheel hitch. Like our other A series hitches, this 30K 5th wheel hitch uses a patented cast yoke to allow for unimpeded head movement, while providing exceptional stability for the trailer. The