Best Trailer Brake Assemblies Under $100 (2026)
We ranked parts under $100 by value score using build completeness, axle/load rating, bolt pattern compatibility, and documented features
The Verdict
- Best Overall: GM 20904439 Trailer Brake Continue Relay Assembly — Best relay replacement: direct OE-compatible relay assembly for restoring GM trailer brake relay function
Top Picks
-
1
Best Overall GM 20904439 Trailer Brake Continue Relay Assembly
Best relay replacement: direct OE-compatible relay assembly for restoring GM trailer brake relay function
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
-
2
RV Murts 2 Pairs 10" x 2-1/4" Electric Trailer Brake Shoes
Best shoe value: pairs of 10" x 2-1/4" electric brake shoes for Dexter-style electric brake systems
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
-
3
Trailer brake drum kit 5 on 4.5" for 3500 lbs axle
Best drum kit for 3,500 lb axles: 5-on-4.5" drum kit sized for common 3,500 lb trailer axles
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
-
4
RV MURTS 10" x 2-1/4" Electric Brake Assembly (4-bolt) for 2300-3500 lb axles
Best 4-bolt assembly: complete 10" x 2-1/4" electric brake assembly designed for 2,300–3,500 lb axles
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
-
5
12x2 electric trailer brake assembly right side
Best single-side 12" option: right-side 12" x 2" electric brake assembly for larger-axle braking setups
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
-
6
SEHNSUCHT 10" x 2-1/4" Electric Brake Assembly (1 Left + 1 Right) 3,500 lb
Best matched pair: left and right 10" x 2-1/4" electric assemblies sold together for 3,500 lb axles
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
-
7
Trailer electric brake assembly 12" x 2" (pair) for 5200-7000 lb axles
Best higher-capacity set: 12" x 2" pair rated for 5,200–7,000 lb axles for heavier trailers
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
-
8
12" x 2" electric trailer brake assembly pair
Best 12" pair for multiple bolt counts: 12" x 2" electric assembly pair compatible with common lug configurations
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
-
9
VEVOR Electric Trailer Brake Drum 8-Hole 4-Inch BC
Best replacement drum: 12" cast-iron trailer brake drum with 8-hole, 4" BC for heavy-duty fitment
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
-
10
VEVOR 15FT Semi Truck Air Lines Kit with Glad Hands & 7 Way ABS Power Line
Best air-line kit: semi truck air lines kit with glad hands and 7-way ABS power line for pneumatic systems
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