A direct-replacement electric brake assembly built for the left-hand (driver's side) wheel position on trailers and RV axles rated from 4,000 to 7,000 lbs. When your current brakes are worn, dragging, or no longer responding reliably to your brake controller, this assembly swaps in without fabrication -- same bolt pattern, same drum sizing, same magnet-actuated design.
The Lippert 298275 is a 12-inch by 2-inch electric brake assembly designed for the left-hand side of trailers running Lippert or compatible axles in the 4,000 to 7,000 lb capacity range. This covers a wide range of travel trailers, fifth wheels, toy haulers, and utility trailers that use electric brake systems paired with an in-cab brake controller.
The assembly includes the backing plate, brake shoes, actuating hardware, and the electromagnetic brake magnet -- everything needed to restore proper brake function on one wheel end. It mounts via a 5-bolt pattern common to Lippert axle flanges in this weight class.
Sized for standard 12-inch brake drums used on mid-weight trailer axles rated 4,000 to 7,000 lbs. Confirms fitment before ordering.
Matches the standard Lippert axle flange bolt circle, allowing direct bolt-on replacement with no drilling or adapter plates required.
Configured specifically for the left-hand wheel position. Brake shoe arc and hardware orientation are side-specific -- do not swap left and right.
Works with any standard 12V electric brake controller. The electromagnet engages when the controller sends current, pressing the shoes against the drum proportionally to braking demand.
This brake assembly is intended for trailers and RVs using Lippert-manufactured axles or axles with compatible 12x2 brake flange dimensions in the 4,000 to 7,000 lb per-axle rating. Common applications include:
Electric trailer brakes rely on a 12V signal from your tow vehicle's brake controller. When you press the brake pedal, the controller sends current to the magnet in each brake assembly. The magnet energizes, contacts the inside of the rotating drum, and uses rotational force to self-actuate the shoes outward against the drum surface -- providing braking force proportional to the controller's output signal.
Because actuation is controller-dependent, proper brake controller calibration is essential for even, effective braking. A freshly installed brake assembly will not perform correctly if the brake controller is out of adjustment or if the wheel wiring connection is corroded or broken.
Replacing a brake assembly is a manageable DIY job for anyone comfortable working on trailer wheel ends. General process: