What Parts do I Need to Flat Tow My 2022 Ram 1500 Bighorn 4x4 Crew Cab Behind 2013 Entegra Air Brake
Updated 10/31/2025 | Published 03/29/2025
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Question:
I have a 2022 Ram 1500 Bighorn 4x4 crew cab with a Roadmaster Sterling all-terrain tow bar part 576. Can you list everything I need to flat tow behind my 2013 Entegra Coach Aspire w/air brakes?
asked by: David R
Expert Reply:
Hello David,
Happy to get the parts you need to tow your Ram Bighorn 4x4 Crew Cab to match up with your Roadmaster Sterling All-Terrain Tow Bar # RM-576.
Base Plate (pick one of the following):
- Fits 3.0 EcoDiesel V6 with lower Active Air Grille Shutters. TRX with 6.2 okay. No Rebel. # RM74MR
- Fits Rebel model only. No Diesel. No TRX. # RM-522205-5
- Fits all with 5.7, 3.6 & 3.0 EcoDiesel motors. No 3.0L EcoDiesel V6 with lower Active Air Grille Shutters. No Rebel or TRX. # RM-522203-5
Wiring:
- Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord # RM-15267
-Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25 (peace of mind that your battery is not going to be dead when you get to your destination)
Braking System:
- Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional # SM99243
- Roadmaster Universal Stop Light Switch Kit # RM-751000 (If the brake lights do not work with the towed vehicle's ignition key turned to the "tow" position, you need a brake light switch kit to provide a signal to the supplemental braking system. Roadmaster manufactures both vehicle-specific and universal brake light switch kits.)
Since the Roadmaster Sterling All-Terrain Tow Bar # RM-576 does not come with safety cables you will also need a set of the # RM-645.
Also, if you want to keep the front of your truck protected while flat towing, then you will want the Roadmaster Tow Defender Protective Screen for Towed Vehicles # RM-4750.
I've attached some review/install videos as well as a help article about the must need components for flat towing, it is a great read whether you are a seasoned flat tower or new to flat towing.
Are you new to the flat tow world, or just getting a new vehicle set-up to flat tow? If you have any questions about the parts, please feel free to comment below =)
Product Page this Question was Asked From
Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Tow Bar Base Plate
- Removable Draw Bars
- Twist Lock Attachment
- Partially Hidden
- Roadmaster
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Kate F.
10/27/2025
Hey David, how did your flat tow setup for the Ram Bighorn work out with the Roadmaster Sterling tow bar and the Air Force One braking system? Your update could make it easier for the next person setting up a similar coach and truck combo.