The best electric trailer brake magnet depends on your brake assembly’s dimensions and axle rating. For 5,200–7,000-pound axles with 12-by-2-inch brakes, consider the RALZAOTO, dreamdragon, or RV Murts kits. For 3,500-pound axles with 10-by-2¼-inch brakes, the RALZAOTO and RV Murts options are relevant. A separate RALZAOTO kit covers certain 9,000–10,000-pound axles with larger 12¼-inch brakes. Check your existing assembly before ordering; similar-looking magnets are not automatically interchangeable.
| Product | Best For | Listed Fit |
|---|---|---|
| RALZAOTO 12-inch kit | Complete replacement hardware | 5,200–7,000 lb; 12-by-2 in |
| RALZAOTO 10-inch kit | 3,500-pound axle applications | 3,500 lb; 10-by-2¼ in |
| RALZAOTO 12¼-inch kit | Higher-capacity brake assemblies | 9,000–10,000 lb; 12¼ in |
| RV Murts 10-inch kit | Another 3,500-pound option | 3,500 lb; 10-by-2¼ in |
| dreamdragon 12-inch kit | Heavy-duty 12-inch assemblies | 5,200–7,000 lb; 12-by-2 in |
RALZAOTO 12-Inch Magnet Kit
Best for: Owners replacing magnets on 12-by-2-inch electric brake assemblies rated for 5,200–7,000-pound axles. This kit includes two wired magnets, two coil springs, and two retainer clips, so the listed package covers hardware for a pair of brake magnets.
The product lists Dexter, Rockwell, Al-Ko, and Lippert among the brands it can replace. Its stated construction emphasizes toughness and wear resistance, and the seller says products are tested to OE standards. It was selected as a practical all-in-one option for a common 12-inch brake size.
Check before buying: Confirm both the 12-by-2-inch assembly size and axle rating. Brand names alone do not establish fitment for every brake configuration.
RALZAOTO 10-Inch Magnet Kit
Best for: A 3,500-pound axle with a 10-by-2¼-inch electric brake assembly. The package includes two magnets with wires, two coil springs, and two retainer clips. The listed replacement brands include Dexter, Axletech, Al-Ko, and Lippert.
This kit is a suitable comparison choice when the trailer uses the smaller 10-inch brake format rather than the 12-by-2-inch type. The seller describes the parts as wear-resistant and tested to OE standards, with installation described as easy and accurate.
Check before buying: Do not choose it based on axle rating alone. The brake assembly must also match the stated 10-by-2¼-inch dimensions.
RALZAOTO 12¼-Inch Magnet Kit
Best for: Trailer owners whose assemblies use 12¼-inch brakes and axles rated for 9,000–10,000 pounds. The kit is specified for 12¼-by-3⅜-inch or 12¼-by-4-inch electric brake assemblies. It includes two wired magnets, two coil springs, and two retainer clips.
This is the most relevant listed option for the larger brake dimensions and higher axle ratings in this selection. The product identifies Dexter, Rockwell, Al-Ko, and Lippert as replacement applications and describes the materials as durable and wear resistant.
Check before buying: The listing covers two different brake widths. Verify which width your assembly uses, as well as its axle rating.
RV Murts 10-Inch Magnet Kit
Best for: Buyers seeking another kit for 3,500-pound axles with 10-by-2¼-inch electric brakes. The listing specifies two magnets, two retainer clips, and two coil springs. It describes the magnets as steel-constructed, wear resistant, and intended to provide responsive braking.
This option was selected as a direct size-and-rating alternative to the RALZAOTO 10-inch kit. Comparing both listings can help buyers choose based on the stated package contents and the fit details for their trailer.
Check before buying: The listing describes a Dexter-type assembly. Verify the existing brake dimensions and configuration instead of relying on the “Dexter type” wording alone.
dreamdragon 12-Inch Magnet Kit
Best for: Owners with 12-by-2-inch electric brakes and 5,200–7,000-pound axles who want a listed replacement for brands including Dexter, Rockwell, Al-Ko, and Lippert. The product highlights high-strength steel, wear resistance, and performance for prolonged heavy-duty use.
It is a size-matched alternative to the other 12-inch kits in this guide. The listing emphasizes responsive braking and OE-standard durability, making it relevant when comparing replacement magnets for this axle range.
Check before buying: The product name mentions retainer clips and coil springs, but the feature details provided do not specify package quantities. Confirm the included hardware if you need a complete kit.
Buying Guide: How to Choose an Electric Trailer Brake Magnet
Which brake size and axle rating do you need?
Start with the dimensions printed on the brake assembly or supplied in its service information. Match both the magnet’s brake size and the axle rating. For example, a 12-by-2-inch kit listed for 5,200–7,000-pound axles is not the same application as a 12¼-inch kit for 9,000–10,000-pound axles. The axle rating by itself is not enough to confirm fit.
Do you need replacement hardware too?
Compare package contents if springs and clips are due for replacement. Several kits above explicitly include two magnets, two coil springs, and two retainer clips. The dreamdragon feature details do not give hardware quantities, so verify the package before relying on it as a complete hardware set.
What should you check before installation?
Inspect the old parts and confirm the assembly dimensions, axle rating, and wiring arrangement against the replacement information. If the listed fit details do not match your brake assembly, consult the trailer or brake manufacturer rather than assuming that a brand-name reference guarantees compatibility. Follow appropriate service procedures when working on trailer brakes.
Frequently Asked Questions
What does an electric trailer brake magnet do?
It is part of an electric brake assembly. When the trailer braking system is energized, the magnet helps actuate the brake mechanism.
Can I choose a magnet by axle rating alone?
No. Match the brake assembly dimensions as well as the axle rating. The products listed here cover different brake sizes and are not interchangeable based only on capacity.
When should a brake magnet be replaced?
Consider inspection or replacement if a magnet is damaged or the brake system is not responding as expected. Diagnose the full brake system, since a symptom can have more than one cause.
Are retainer clips and coil springs included with every kit?
Not every listing states the package contents in the same detail. Check the product’s current package information, especially when you need clips and springs along with the magnets.