Best Trailer Brake Assemblies Under $100 (2026)
We scored parts by fitment accuracy, axle/load rating, material quality, completeness of kits, and overall value under $100
The Verdict
- Best Overall: GM 20904439 Trailer Brake Continue Relay Assembly — Best relay replacement: direct OE-style relay assembly for restoring trailer brake control and compatibility with GM systems
Top Picks
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1
Best Overall GM 20904439 Trailer Brake Continue Relay Assembly
Best relay replacement: direct OE-style relay assembly for restoring trailer brake control and compatibility with GM systems
GM Genuine Parts trailer brake relay assembly designed for OE fit and reliable operation. Customers note easy installation and solid functionality as an OEM replacement
- OEM replacement
- easy installation
- GM-engineered and tested
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2
RV Murts 2 Pairs 10" x 2-1/4" Electric Trailer Brake Shoes
Best shoes value: pairs of 10" x 2-1/4" electric brake shoes sized for Dexter-type setups and common 3,500 lb axles
2-pair self-adjusting brake shoes for 10" x 2.25" electric trailer brakes (2300-3500 lbs). Easy install with included springs and pins; improves brake performance. Customers report easy installation and good value
- self-adjusting design
- fits 10" x 2.25" brakes
- includes installation hardware
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3
Trailer brake drum kit 5 on 4.5" for 3500 lbs axle
Best drum kit for 5-on-4.5 hubs: complete 5-on-4.5" drum kit designed for 3,500 lb axles with necessary mounting features
Trailer brake drum kit with 5 on 4.5" bolt pattern, includes inner/outer bearings and seals. Durable chrome steel construction with protective coating; installs on tapered spindles. Customer note: easy to install and fits well
- pre-installed bearings and seals
- durable chrome steel with sealing coating
- 5 on 4.5" bolt pattern compatible
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4
RV MURTS 10" x 2-1/4" Electric Brake Assembly (4-bolt) for 2300-3500 lb axles
Best 10" electric assembly: 10" x 2-1/4" 4-bolt assemblies made for 2,300–3,500 lb axles to simplify replacement jobs
Electric brake assembly for trailer axles, 10 x 2-1/4, 4-bolt. Provides smoother braking and up to 50% better stopping distance with proper fit. Customers note easy installation and good value
- 4-bolt mounting for standard hubs
- fits 2300-3500 lb trailer axles
- no actuator/hydraulic lines required
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5
12x2 electric trailer brake assembly right side
Best single-side 12" option: right-side 12" x 2" electric brake assembly for heavier trailers needing that specific side fitment
12" x 2" electric brake assembly (right side) for 5200-7000 lb axles; supports various bolt patterns and spline sizes. Not self-adjusting. Customers praise easy installation, quality, and fit
- right-side 12x2 brake assembly
- fits multiple axle capacities
- wide bolt pattern compatibility
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6
SEHNSUCHT 10" x 2-1/4" Electric Brake Assembly (1 Left + 1 Right) 3,500 lb
Best matched 10" pair: paired 10" x 2-1/4" left and right electric assemblies rated for 3,500 lb axles to ensure balanced braking
Electric brake assembly for 3,500 lb trailer axles with 10" x 2-1/4" drums. Delivers responsive braking and solid construction; compatible with Dexter and other brands. One customer notes compatibility with 3500 axles and installation ease
- 10" x 2-1/4" drum size
- 4-hole mounting pattern
- manual adjusting electric brakes
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7
Trailer electric brake assembly 12" x 2" (pair) for 5200-7000 lb axles
Best 12" heavy-duty pair: 12" x 2" pair built for 5,200–7,000 lb axles to serve higher-capacity trailer hubs
Electric brake assembly set for 12" x 2" brakes, fits Dexter and other brands on 5200-7000 lb trailer axles. Includes left and right brakes; bolt-on to standard 5-hole pattern. Customers note easy installation and solid quality, with some mixed feedback on self-adjustment
- 12" x 2" electric brake set
- paired left and right brakes
- fits 5-hole bolt pattern
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8
12" x 2" electric trailer brake assembly pair
Best dual 12" set: 12" x 2" pair suited for a range of hub lug patterns with parts intended as a matched replacement set
Pair of 12" x 2" electric trailer brake assemblies for common axle ratings. Includes mounting hardware notes and non-self-adjusting operation. Customer insight highlights easy installation and solid fit
- set of two assemblies
- fits 6-8 lug patterns
- multiple axle compatibility
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9
VEVOR Electric Trailer Brake Drum 8-Hole 4-Inch BC
Best drum-only option: 12" gray cast-iron drum with 8-hole bolt circle for custom or axle-specific rebuilding needs
Electric brake drum for trailers/RVs with 12-inch internal diameter and 8-hole 6.5-inch bolt circle. Stable braking under heavy loads with heat-conductive gray cast iron. One customer notes easy installation and good value, though some report missing hardware
- 8-hole on 6.5 inch bolt circle
- 12-inch drum internal diameter
- designed for 7000 lbs trailer axles
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10
VEVOR 15FT Semi Truck Air Lines Kit with Glad Hands & 7 Way ABS Power Line
Best air-line kit: semi-truck air-line and glad-hand kit with 7-way ABS power line for integrating air systems on larger rigs
VEVOR 15ft air lines kit for semi trucks, includes 2 glad hands, 2 gladhand handles, hooks, and a spring kit. Provides a comprehensive replacement for worn or tangled ABS air lines; customers note quality and value for money
- 15ft air lines kit
- 2 glad hands included
- comprehensive accessory set