Our GN horse trailer (actually a stock trailer) has a steel frame, which includes the GN and hitch. All the rest of the trailer is aluminum. See attached.
JD 8320 MFWD, JD 6415 MFWD, FEL, and cab, John Deere MFWD 4600, John Deere 4020, John Deere 4430, John Deere 455 mower, Deutz, and Gehl 4610 perkins skidsteer