Looking For Leaf Springs For 2021 Grand Design Momentum 397Th With 7,000 lb Axles
Updated 11/13/2025 | Published 10/26/2025
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Question:
Looking for leaf springs for a 2021 Grand Design Momentum 397Th. I believe they are 7,000 lbs axles. What is the best replacement leaf springs available in addition to the ubolt kit. Thanks
asked by: Michael
Expert Reply:
Hello Michael, thanks for reaching out. We do carry leaf springs for 7,000 lb axles, but there is no way to look up your camper to know exactly what spring you will need. RV manufacturers just are not that specific with their online literature.
The main thing I will need to know is the length of the current leaf springs. It is best to jack up one side of the trailer so you can measure the spring without a load. Leaf springs are measured across from center eye to center eye. Also note the number of leaves the spring has.
For example, the 6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles part # e64SR is 24-7/8" long eye-to-eye.
The U-bolts are standard so we can definitely provide those. I recommend the CE Smith U-Bolt Kit # CE23003.
Let me know the length on your leaf springs and I am happy to look into it and make sure you get the right thing.
You are wanting to replace all four springs, correct? It is Tandem axle, right?
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Product Page this Question was Asked From
6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles - 24-7/8" Long
- Trailer Leaf Springs
- Double Eye Springs
- 9/16 Inch Eye
- Nylon Bushings
- 7000 lbs
- 1-3/4 Inch Wide
- 6 Leaf
- 24-7/8 Inch Long
- Standard Grade
- etrailer
more information >
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Jesse M.
11/13/2025
Hey Michael, did you get a chance to measure the length of your current leaf springs on the Momentum 397TH? Once you have that, we can confirm if the 6-leaf spring and U-bolt kit are the right match. Let me know what you find so we can get you set up with the right fit.