How to Tell Which MORryde ALLTREK 4000 Kit Will Fit a 2023 Grand Design Imagine XLS 21BHE
Updated 10/30/2025 | Published 02/26/2025
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Question:
Looking for a suspension upgrade for my travel trailer. I am looking at the Alltrek 4000 kit as well as a wet bolt kit. I have a 2023 Grand design imagine XLS 21 BHE and having trouble finding the right parts. Requesting help identifying the parts needed for this and if there is anything I need additionally to install them myself. Thanks.
asked by: Dustin
Expert Reply:
Hey Dustin, thanks for reaching out!
You'll need the MORryde ALLTREK 4000 # MR89DR if you have a 33" wheelbase, or the kit # MR29DR if you have a 35" wheelbase. The wheelbase is measured from the center of the front wheel to the center of the rear wheel. I'm not sure what this is on your Grand Design, but it's a fairly simple measurement to take.
While you're out getting the wheelbase, I also recommend measuring the length of your shackle straps center to center. This will tell you if you need the 2-1/4" Kit # MR46ZR or the 3-1/8" Kit # MR76ZR.
The last step is checking out the qualifier for the ALLTREK which you can see here - https://www.morryde.com/wp-content/uploads/2023/01/AllTrek-4000_Qualifier_v4.pdf. This is a great suspension upgrade, but it does have a bit of travel so MORryde put together this document so it's easier for people to check and make sure this will work for their trailer.
Let me know if you have any other questions!
Product Page this Question was Asked From
MORryde ALLTREK 4000 Shock Absorbing Equalizers for Tandem Axle Trailers - 33" Wheelbase - 8K
- Trailer Suspension Parts
- Equalizer Upgrade Kit
- Boat Trailer
- Camper
- Car Hauler
- Snowmobile Trailer
- Utility Trailer
- Double Eye Springs
- 6-1/2 Inch Long
- Tandem Axle
- MORryde
more information >
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Jon G.
10/30/2025
Hey Dustin, what did you find when you measured the wheelbase and shackle strap length on your Grand Design? Once you had those numbers, did the AllTrek 4000 and wet bolt kit line up the way you hoped? Your update could make it easier for others working on the same trailer setup.