Can Curt Air Ride LC158778 Replace Lippert 1116 on 2021 Keystone Montana 3121RL
Updated 10/30/2025 | Published 02/05/2025
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Question:
I have a 2021 Montana 3121 Legacy. It currently has a lippert 1116 pin box. .Can I use a Curt Air ride LC 158778 as a replacement. I know it sits a few inches forward. Will that affect my ride?
asked by: Nate
Expert Reply:
Hey Nate! You actually can't use the # LC158778 since it is designed to replace a 1621. You have a Lippert 1116 so you need the Trailair Air Ride 5th Wheel Pin Box # LC155943. This is specifically designed to replace a Lippert 1116 5th-wheel pin box so there won't be any negative impact on your ride. The only thing you should expect is the improved ride quality from the internal air bag. If you have any other questions don't hesitate to reach out in the comments below.
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Product Page this Question was Asked From
Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 21000 lbs
- Air Ride Suspension
- Fixed Turret
- Lippert 1621
- Lippert 1621HD
- Lippert
more information >
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Robin H.
10/30/2025
Hey Nate, how did the Trailair Air Ride pin box work out on your Montana? I'm curious if the improved ride quality was noticeable once you got it on the road. Your feedback could really help others looking to upgrade from the Lippert 1116.