Determining The Correct Roadmaster Comfort Ride System For A 2022 Grand Design Momentum 399TH
Updated 11/25/2022 | Published 11/24/2022
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Question:
Hi guys, am purchasing a 2022 Grand Design Momentum 399TH, was wondering if you could direct me to the correct parts/numbers I would need to do the Roadmaster slipper spring and shock absorber upgrade? I dont have the unit yet for another week so I cant lay eyes on the axles, but thought you might know what i would need. Thank you.
asked by: Greg C
Expert Reply:
Grand Design's website doesn't list the axle capacity of the 2022 Momentum 399TH so you would need to check the axles prior to purchasing a Comfort Ride kit. Most likely you'll have 7k axles, which would require part number # RM-2460-2570, but you could also have 8k axles.
If you have 8k axles you'll want to use some calipers # PTW80157 measure the diameter of the axles because there are 8k kits for 3" axles # RM-2460-2580 and 3-1/2" axles # RM-2470-2580.
I've attached a video below where Dave will walk you through the installation process if you choose to do this yourself.
Product Page this Question was Asked From
Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shocks - Tandem 8K, 3-1/2" Axles
- Trailer Suspension Parts
- Equalizer Upgrade Kit
- Leaf Spring Replacement System
- Suspension Kits
- Boat Trailer
- Camper
- Car Hauler
- Snowmobile Trailer
- Utility Trailer
- 8000 lbs
- Round Axle - 3-1/2 Inch
- Tandem Axle
- Roadmaster
more information >
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