Upgrading Electric Drum Brakes To Disc Brakes On 2021 Grand Design Solitude 310GKR
Updated 12/15/2025 | Published 11/25/2024
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Question:
Hi, I am looking to upgrade the electric drum brakes on my 2021 Grand Design Solitude 310GKR to disc brakes. Could you please guide me to which kit is compatible? The trailer has 7000 axles, 17.5 wheels, 8 lugs, 9/16 studs, leaf suspension with Moryde CRE3000.
asked by: Rick B
Expert Reply:
Hello Rick, thanks for reaching out. The 7,000 lb axle on your 2021 Grand Design Solitude 310GKR uses a standard bearing combination, so finding compatible disc brakes will be easy. Here is what I recommend:
- DeeMaxx Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - Maxx Coating - 9/16" Bolts - 7K # DE68YR
- Hydrastar Electric Over Hydraulic Actuator Kit for Disc Brakes - 1,600 psi # HBA16-252-82
The disc brake kits are enough for one axle, so you will need two kits if you want brakes on both axles. I recommend this DeeMaxx kit specifically because it has the 9/16" studs which you will want to stick with.
The Hydrastar kit is a full conversion kit so you get everything you need to convert from electric drum to EOH disc brakes. Overall disc brakes are more durable and provide more stopping power than drum brakes.
You will also want to make sure the brake controller if your cab is compatible with EOH brakes. Pretty much any aftermarket controller will be OEH compatible or will have an EOH mode you can switch to. A lot of factory brake controllers can have compatibility issues with EOH brakes so if you have a factory controller I recommend switching to something like the Tekonsha P3 # 90195.
We wrote a guide that goes over the process of adding EOH brakes to a trailer, and you will find it linked below. Feel free to reach out if you have any other questions.
Product Page this Question was Asked From
Kodiak Disc Brakes - 13" Hub/Rotor - 8 on 6-1/2 - Dacromet - 7,000 lbs - Oil
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 9/16 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- 17-1/2 Inch Wheel
- Kodiak
more information >
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Jesse M.
12/15/2025
Hey Rick, how did the upgrade to disc brakes on your Grand Design Solitude go with the DeeMaxx and Hydrastar kits? Your results could really help others planning the same conversion. Sharing what worked best would be a big help to the community.