On my hitch head (with the same size ball), the nut is 1 7/8". You'll need pretty good torque wrench to pull that too - I think it's 450 ft. lb. Best to take it to a shop and have them torque it for you.
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2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
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