What Suspension Upgrade Parts do I Need to Replace the Suspension on 2021 Imagine 2500rl?
Updated 09/26/2025 | Published 04/30/2025
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Question:
I have a grand design 2021 Imagine 2500rl that Id like to replace springs and add an upgraded equalizer kit along with wet bolts. What all do I need?
asked by: Callen
Expert Reply:
Hello Callen,
According to my research the 2021 Grand Design Imagine 2500RL comes with (2) 3,500 pound axles. Since I do not have a database that supplies me with what is put on what trailer, you will need to check the measurements on the parts you are replacing.
- Leaf springs: should be 25 1/4", you want to measure with the weight unloaded (sometimes best to jack it up to get the weight off), they do stretch over time so you might get a longer measurement like 26". You will want 4 of the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/4" Long # DX23CR.
- Shackle strap kit: I am showing that yours are 2 1/4" from so you will want the kit you were looking at, the MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 2-1/4" Long Shackle Straps # MR46ZR.
- Equalizer: I found that you have the 33" wheelbase, I would still measure your current ones to make sure they are close to the MORryde ALLTREK 4000 Shock Absorbing Equalizers for Tandem Axle Trailers - 33" Wheelbase - 8K # MR89DR. I attached an image for reference.
- U-bolt kit: It is recommended that you do not reuse your U-bolts as they do stretch overtime, you will need 2 sets of the CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc # CE23002
Once you’ve taken your measurements, feel free to comment below with your findings (especially if the axle rating differs) so I can help you confirm fitment. As mentioned earlier, my part suggestions are based on research rather than a manufacturer-supplied database.
Getting things all geared up for a big trip? If so, where are you headed?
Product Page this Question was Asked From
MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 2-1/4" Long Shackle Straps
- Trailer Suspension Parts
- Suspension Kits
- Boat Trailer
- Snowmobile Trailer
- 2-1/4 Inch Long
- Tandem Axle
- MORryde
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Kate F.
9/26/2025
Hey Callen, did you have a chance to measure the parts on your Grand Design Imagine? I'd love to hear if the suggestions worked out for you, as it could help others looking to upgrade their trailer suspension.