Electric trailer brakes are a legal requirement in most states for trailers over a certain weight, and they are essential for safe stopping. We carry complete brake assemblies, backing plates, magnets, shoes, drums, and hardware for common trailer axle sizes from 7-inch to 12-inch brakes.

Brake system components

• Complete assemblies: Pre-assembled brake units ready to bolt onto your axle flange. Available for left and right sides.
• Brake magnets: The electromagnet that contacts the drum to create braking force. A common wear item.
• Brake shoes: The friction material that slows the wheel. Replace when worn below minimum thickness.
• Backing plates: The mounting plate that holds the brake assembly to the axle.
• Drums: Replace if grooved, cracked, or out-of-round.
• Hardware kits: Springs, pins, and adjusters needed for brake service.

Sizing your brakes

• Brake size is measured by drum diameter (10-inch and 12-inch are most common) and shoe width (2-1/4 inch or 3-3/8 inch).
• Axle capacity helps determine brake size—heavier axles need larger brakes.
• Check the bolt pattern on your axle flange (4, 5, or 6 bolt patterns).

Electric brakes should be inspected annually and adjusted as shoes wear. Contact us if you need help identifying your brake size.

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