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Gen-Y Gooseneck Pin Box for 2021 Keystone Montana 3121RL  

Updated 11/24/2024 | Published 11/22/2024

Question:

I have a 2021 3121rl Montana fifth wheel with a Mor ryde kingpin. Want to go with a Gen-y gooseneck conversion. Has a lippert number 1116 on it. Which hitch do I need? Thank you!

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Expert Reply:

Hi Lynn; thank you for providing that information. Your 2021 Keystone Montana 3121RL has a GVWR of 16,350 lbs. Using the Gen-Y formula GVWR x 0.22 = TW we get 3,597 lbs so you need the 4.5k TW model of the Gen-Y. With the 1116 pin box the correct replacement is the # GY48FR.

expert reply by:
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Robin H
Lynnt profile picture

Lynnt

11/24/2024

Robin, will the 4.5k be heavy enough after break in? Running F350 flatbed. Thank you!

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Etrailer Expert

Robin H.

11/24/2024

@Lynnt yes, with the Gen-Y gooseneck adapter you always want to follow their formula. It is at the high end of the range but you still fall under the 4,500 lb pin weight model.
Lynn profile picture

Lynn

11/24/2024

Thank you so much! @RobinH

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