Hitting the road with your RV and a towed car behind you is a fantastic way to explore, but safety always comes first. A supplemental braking system is not just a nice-to-have; it is a critical component that ensures your towed vehicle stops reliably, protecting you, your family, and everyone else on the highway.
This guide breaks down the best options available, from integrated surge brakes to breakaway switches and installation kits. Whether you are a full-timer or a weekend warrior, you will find the perfect system to match your towing setup and budget.
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NSA RV – Ready Brute Elite II Tow Bar – with Integrated Supplemental Surge …
Best forIntegrated surge brake tow bar
- 2-in-1 tow bar and brake
- Lightweight aluminum construction
ConsiderMay require tow bar adapter
LAIKOU BRK2505 Breakaway Switch Kit Replacement Compatible with Blue Ox Pat…
Best forBlue Ox Patriot breakaway add-on
- Compatible with multiple Patriots
- High-quality brass construction
ConsiderOnly for Blue Ox systems
Roadmaster 8700 Invisibrake Support Braking System with Emergency Breakaway…
Best forVacuum brake vehicles
- Compact and out-of-sight
- Trickle-charges towed battery
ConsiderRequires vacuum brake system
NSA RV – ReadyBrake Towed Vehicle Supplemental Surge Brake System – Proport…
Best forUniversal mechanical surge brake
- Purely mechanical reliability
- Universal fit with most tow bars
ConsiderRequires manual cable routing
NSA RV – Hercules Tow Bar – with Integrated Supplemental Surge Braking Syst…
Best forHeavy-duty towing up to 12k lbs
- Highest 12,000 lb capacity
- Integrated surge brake system
ConsiderHeavier than lighter models
Roadmaster 98450 Even Brake Second Vehicle Kit Compatible with Even Brake S…
Best forSwapping Even Brake between vehicles
- Complete second vehicle kit
- Wireless ICX transmitter
ConsiderOnly for Even Brake systems
TrendsAuto Roadmaster Sterling All-Terrain Tow Bar and Baseplate Combo with…
Best for2018-2026 Wrangler JL towing
- Direct-connect baseplate
- Includes tow bar cover
ConsiderOnly fits Wrangler JL
Roadmaster 98700 New Car Kit Compatible with Invisibrake Supplemental Braki…
Best forInstalling Invisibrake in new vehicle
- All necessary install parts
- Perfect fit for Invisibrake
ConsiderOnly for Invisibrake systems
Towed Vehicle Brake Control – Air Force One Coach Air Kit | Supplemental Br…
Best forAir Force One brake accessory
- Direct OE replacement fit
- Quality tested for reliability
ConsiderSpecific to Air Force One
Blue Ox BRK2505 Patriot Supplemental Breakaway Switch for Braking System | …
Best forBlue Ox Patriot breakaway replacement
- Stops vehicle on breakaway
- Includes switch, cable, harness
ConsiderOnly for Blue Ox systems
NSA RV Ready Brute Elite II – Integrated Surge Brake Tow Bar
Brand: NSA RV Products Inc.
A robust, integrated surge brake system that simplifies your towing setup.
The Ready Brute Elite II is a true 2-in-1 solution, merging a heavy-duty 8,000 lb tow bar with the innovative ReadyBrake surge braking system. Weighing just 48 pounds, its aircraft-grade aluminum body is both robust and lightweight, and the non-binding T-latches and rotating clevis connectors make hooking up on uneven ground a breeze.
Installation is simplified with the updated 2025 cable routing that avoids difficult firewall drilling. The mechanical braking is fully proportional, providing instant response that meets legal requirements across states. For a straightforward, reliable setup, this is a top contender.
- 2-in-1 tow bar and brake
- Lightweight aluminum construction
- Easy 2025 cable routing
- May require tow bar adapter
- Higher upfront cost
LAIKOU BRK2505 Breakaway Switch Kit – Blue Ox Compatible
Brand: LAIKOU
A reliable breakaway switch kit that seamlessly integrates with Blue Ox Patriot systems.
If you own a Blue Ox Patriot braking system and need to add a breakaway switch to a second towed vehicle, the LAIKOU BRK2505 is a perfect fit. It is compatible with Patriot, Patriot II, and Patriot 3 systems, and its brass, plastic, and rubber construction with tin-plated terminals ensures excellent conductivity and long-term durability.
The kit offers plug-and-play installation with two mounting methods, including through the firewall. The coated cables protect against wear and dust, making this a reliable safety addition. It is a smart, cost-effective way to expand your towing capabilities.
- Compatible with multiple Patriots
- High-quality brass construction
- Easy plug-and-play install
- Only for Blue Ox systems
- Not a full braking system
Roadmaster 8700 Invisibrake – Vacuum-Powered Support Brake
Brand: Roadmaster
A compact, powerful brake system that preserves your vehicle's braking feel.
The Roadmaster Invisibrake is designed for towed vehicles with vacuum-powered brakes, energizing your power brakes so you get the same braking feel while towing as you do normally. Its compact size (8″ x 8″ x 2″) allows discreet mounting under seats or in trunks, preserving your vehicle’s space.
It connects directly to the towed vehicle’s battery and trickle-charges it during towing, ensuring your battery stays healthy. With an emergency breakaway system built in, this unit provides full power and peace of mind. Made in the USA, it is a dependable choice for many RVers.
- Compact and out-of-sight
- Trickle-charges towed battery
- Made in the USA
- Requires vacuum brake system
- Professional install recommended
NSA RV ReadyBrake – Mechanical Surge Brake System
Brand: NSA RV Products Inc.
A dependable, mechanical surge brake that works with almost any tow bar.
The ReadyBrake is a purely mechanical supplemental braking system that attaches to your hitch, providing instant, fully proportional braking to the towed vehicle. Its simplicity is its strength—no electronic components to fail, just reliable mechanical action that meets state and provincial laws.
The 2025 cable routing simplifies installation, and it is compatible with virtually any tow vehicle and hitch-mounted tow bar. This universal fit makes it a versatile choice for many setups. If you value tried-and-true reliability, this is a solid pick.
- Purely mechanical reliability
- Universal fit with most tow bars
- Meets legal braking requirements
- Requires manual cable routing
- No electronic monitoring
NSA RV Hercules Tow Bar – 12,000 lb Integrated Surge Brake
Brand: NSA RV Products Inc.
A powerful, high-capacity tow bar with integrated braking for serious RVers.
The Hercules tow bar from NSA RV boasts the industry’s highest capacity at 12,000 lbs, combining a sturdy aluminum construction with the ReadyBrake surge braking system. The non-binding T-latches and rotating clevis connectors make hookup effortless, even on uneven terrain, and it folds easily for storage.
This complete system includes all ReadyBrake cables and a hard-wired in-dash light monitoring system. The new 2025 floorboard cable routing simplifies installation. For heavy towing needs, the Hercules delivers robust performance and integrated braking.
- Highest 12,000 lb capacity
- Integrated surge brake system
- In-dash light monitoring included
- Heavier than lighter models
- Premium price point
Roadmaster 98450 Even Brake Second Vehicle Kit
Brand: Roadmaster
A convenient kit that makes moving your Even Brake between vehicles effortless.
If you own an Even Brake system with a serial number above 27,496 and have two towed vehicles, the Roadmaster 98450 kit is a game-changer. It includes everything needed to quickly swap the Even Brake between vehicles, including the breakaway system, ICX transmitter, and Brake-Lite Relay.
The wireless ICX transmitter sends real-time braking data to your motorhome monitor, ensuring accurate feedback. This kit simplifies setup and saves you from buying a second full system. It is a practical, cost-effective solution for multi-vehicle owners.
- Complete second vehicle kit
- Wireless ICX transmitter
- Simplifies multi-vehicle setup
- Only for Even Brake systems
- Serial number requirement
TrendsAuto Roadmaster Sterling Combo – Wrangler JL Ready
Brand: TrendsAuto
A comprehensive towing solution specifically for Wrangler JL owners with LED lights.
This combo from TrendsAuto is tailor-made for 2018-2026 Wrangler JL models with LED taillights. It includes a direct-connect baseplate that integrates into the frame, a Sterling All-Terrain tow bar with safety cables and a 6-way electrical socket, and a tow bar cover for storage.
The LED wiring kit handles multiplex wiring and LED bulbs, ensuring proper connection to your motorhome. The cover keeps your tow bar clean and operational. For Wrangler owners, this all-in-one package simplifies the entire towing setup.
- Direct-connect baseplate
- Includes tow bar cover
- LED wiring kit included
- Only fits Wrangler JL
- Requires professional installation
Roadmaster 98700 New Car Kit – Invisibrake Install Helper
Brand: Roadmaster
An essential kit for transferring your Invisibrake to a new towed vehicle.
When you upgrade to a new towed vehicle, the Roadmaster 98700 New Car Kit provides all the necessary components to install your Invisibrake system seamlessly. It includes wiring, vacuum lines, fuse holders, and breakaway components, all in original lengths and sizes for a perfect fit.
This kit works with your existing control box, air cylinder, and cable assembly, so you do not need to buy a whole new system. It reduces labor costs and installation time, making the transition to a new vehicle smooth. A smart investment for Invisibrake owners.
- All necessary install parts
- Perfect fit for Invisibrake
- Saves labor and time
- Only for Invisibrake systems
- Requires existing Invisibrake
Air Force One Coach Air Kit – Supplemental Braking Accessory
Brand: Part Synergy
A durable, direct-fit accessory that keeps your Air Force One system performing.
The Air Force One Coach Air Kit from Part Synergy is a direct OE replacement accessory that matches factory specifications, restoring original look and functionality. It is rigorously tested to ensure reliable performance and accurate fitment, so you can trust its quality.
Designed for direct-fit compatibility, it minimizes installation time with no modifications needed. This kit is engineered to withstand daily use and high-stress driving conditions, making it a durable addition to your braking system. If you need a reliable accessory, this is it.
- Direct OE replacement fit
- Quality tested for reliability
- Easy installation without mods
- Specific to Air Force One
- Accessory, not full system
Blue Ox BRK2505 Patriot Breakaway Switch – Safety Essential
Brand: Blue Ox
A critical safety switch that ensures your towed vehicle stops if disconnected.
The Blue Ox BRK2505 is a useful breakaway switch that stops your towed vehicle if the towing mechanism breaks away. It includes the switch, cable, and wiring harness, and works with Patriot, Patriot II, Patriot 3, and Patriot supplemental braking systems.
This kit is perfect for adding a breakaway kit to a second towed vehicle or replacing a broken switch. Its straightforward design ensures reliable operation when you need it most. For Blue Ox users, this is a must-have safety component.
- Stops vehicle on breakaway
- Includes switch, cable, harness
- Works with all Patriot systems
- Only for Blue Ox systems
- Not a full braking system
Buyer’s Guide: What to Consider
Selecting the right supplemental braking system involves several key factors. Use this guide to understand the essentials, from braking type to installation, ensuring you make an informed choice that fits your towing needs.
- Braking Type: Choose between mechanical surge brakes, which are simple and reliable, or electronic systems that offer more features but may require more maintenance. Consider your towing frequency and comfort with technology.
- Towing Capacity: Ensure the system's capacity matches or exceeds your towed vehicle's weight. For heavy vehicles, look for high-capacity models like the Hercules at 12,000 lbs, while lighter setups can use 8,000 lb systems.
- Installation Complexity: Some systems require professional installation, especially those with vacuum lines or complex wiring. Others, like surge brakes, offer simpler DIY installation. Assess your skill level and budget for installation costs.
- Compatibility: Check that the system is compatible with your tow bar, towed vehicle, and motorhome. Some kits are brand-specific, like the Blue Ox breakaway switch, while others offer universal fit. Verify serial numbers and vehicle models.
- Safety Features: Look for breakaway switches that activate in emergencies, and monitoring systems that provide real-time feedback. These features enhance safety and give you peace of mind on the road, especially during long trips.
Conclusion
Choosing the right supplemental braking system is crucial for safe and enjoyable RV towing. Whether you prefer the simplicity of mechanical surge brakes like the ReadyBrake or the advanced features of electronic systems, there is a solution for every setup and budget.
Consider your towing capacity, vehicle compatibility, and installation preferences. For most RVers, the integrated Ready Brute Elite II offers a perfect balance of performance and convenience, while breakaway kits are essential for multi-vehicle owners. Prioritize safety and reliability, and you will hit the road with confidence.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
With a passion for exploring the great outdoors and staying up to date on the latest fashion trends, Erica uses her expertise to provide valuable insights into the products that matter most to her readers.
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