A ball mount (601; 701; 801) for measuring tongue weight of a trailer, comprising: a ball portion (620; 720; 820) having a hitch ball (607; 707; 807) configured to couple with a tongue of a trailer; a hitch portion (610; 710; 810) for interfacing with a hitch receiver associated with a vehicle; a load measurement device (630; 730) associated with the ball portion (620; 720; 820) to determine a magnitude of a downward force (651; 751) on the hitch ball (607; 707; 807), the load measurement device (630; 730) including a reservoir (632; 732) having a fluid and a piston (634; 734) disposed therein, and a pressure sensor (636; 736) in fluid communication with the reservoir (632; 732), wherein the hitch ball (607; 707; 807) is configured to move against the piston (634; 734) and exert a force on the piston (634; 734), thereby affecting a pressure of the fluid in response to the downward force (651; 751) on the hitch ball (607; 707; 807); and a support structure (660; 760) having a hitch ball opening (661; 761) to receive a lower portion (662; 762) of the hitch ball (607; 707; 807) and facilitate the hitch ball (607; 707; 807) exerting the force on the piston (634; 734); characterized in that the hitch ball (607; 707; 807) comprises a retention opening (663; 763) that receives a retention pin (664; 764) to facilitate capturing the hitch ball (607; 707; 807) in the hitch ball opening (661; 761), wherein a clearance between the retention opening (663; 763) and the retention pin (664; 764) is provided to facilitate movement of the hitch ball (607; 707; 807) against the piston (634; 734) in response to the downward force (651; 751) on the hitch ball (607; 707; 807). a ball portion (620; 720; 820) having a hitch ball (607; 707; 807) configured to couple with a tongue of a trailer; a hitch portion (610; 710; 810) for interfacing with a hitch receiver associated with a vehicle; a load measurement device (630; 730) associated with the ball portion (620; 720; 820) to determine a magnitude of a downward force (651; 751) on the hitch ball (607; 707; 807), the load measurement device (630; 730) including a reservoir (632; 732) having a fluid and a piston (634; 734) disposed therein, and a pressure sensor (636; 736) in fluid communication with the reservoir (632; 732), wherein the hitch ball (607; 707; 807) is configured to move against the piston (634; 734) and exert a force on the piston (634; 734), thereby affecting a pressure of the fluid in response to the downward force (651; 751) on the hitch ball (607; 707; 807); and a support structure (660; 760) having a hitch ball opening (661; 761) to receive a lower portion (662; 762) of the hitch ball (607; 707; 807) and facilitate the hitch ball (607; 707; 807) exerting the force on the piston (634; 734); characterized in that the hitch ball (607; 707; 807) comprises a retention opening (663; 763) that receives a retention pin (664; 764) to facilitate capturing the hitch ball (607; 707; 807) in the hitch ball opening (661; 761), wherein a clearance between the retention opening (663; 763) and the retention pin (664; 764) is provided to facilitate movement of the hitch ball (607; 707; 807) against the piston (634; 734) in response to the downward force (651; 751) on the hitch ball (607; 707; 807). <EOS>