SMI Airforce one requires air brakes on the motorhome It uses the air pressure from your braking system to proportionally apply braking power in the towed vehicle.
The Roadmaster system will not be compatible and if your coach doesn't have air brakes the SMI system can not be used.
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2013 Winnebago Journey 36M DP. Full time since 2015. 1987 FJ60 Flat Towed, FAILING 2000W of GRAPE Solar, 800AH LifeBlue LiFePO4 batteries (excellent), SMI Toad Brakes.
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