12-1/4" x 3-3/8" Left-Hand Self-Adjusting Electric Trailer Brake Assembly – Fits 8,000 lb (8K) Dexter Axles – Replaces K23-434-00

Upgrade your trailer’s braking performance with this TRAILER SUPPLIES Left-Hand (Driver Side) Electric Trailer Brake Assembly, engineered for 8,000 lb (8K) trailer axles using a standard 4-bolt brake mounting flange. This listing includes one (1) 12-1/4" × 2-1/2" self-adjusting electric trailer brake assembly, designed specifically for the left (driver) side of the trailer. The brake assembly comes fully preassembled with heavy-duty brake shoes, return springs, and a high-quality electric magnet mounted on a durable steel backing plate. The self-adjusting mechanism automatically maintains proper shoe-to-drum clearance during normal braking, helping reduce maintenance while delivering consistent and reliable stopping power. Designed for direct compatibility with Dexter and LCI (Lippert) 8K axle systems, this left-hand brake assembly uses standard 12-1/4" brake drums and a common 4-bolt mounting pattern. Bolt hole spacing (center-to-center): approximately 5" diagonal, 3-7/16" horizontal × 3-5/8" vertical. Ideal for utility trailers, equipment trailers, livestock trailers, RVs, and cargo trailers, this left-hand brake assembly is perfect for replacement or single-side repairs. ⚠️ Trailer brake components are not universal — please verify brake size, bolt spacing, and axle compatibility before ordering.

• 【Compatible with Dexter & Lippert Axles】Self-adjusting electric trailer brake assembly designed for 8,000 lb (8K) trailer axles. Compatible with Dexter and LCI (Lippert) axle systems using standard 12-1/4" brake drums.
• 【Standard 4-Bolt Mounting】 Features a standard 4-bolt brake mounting flange with bolt hole spacing (center-to-center) of approximately 5" diagonal, 3-7/16" horizontal × 3-5/8" vertical; measurements are taken center-to-center, not edge-to-edge—please verify bolt spacing before ordering.
• 【Self-Adjusting Performance】Automatically maintains proper clearance between brake shoes and drum, providing consistent braking performance with reduced maintenance.
• 【Left-Hand (Driver Side) Brake Assembly】Includes one (1) Left-Hand / Driver-Side 12-1/4" × 2-1/2" self-adjusting electric brake assembly. ⚠️ This listing is for the LEFT side only — right-hand brake sold separately.
• 【Replaces Dexter OEM Part Number】Direct replacement for Dexter K23-434-00 (Left-Hand). Fully compatible with Dexter and Lippert 8K axles for easy bolt-on installation.