Genuine TRP 12" x 2" electric brake assembly for 5,200–7,000 lb trailer axles. Available in Left Hand (122259) or Right Hand (122451). Self-adjusting design maintains optimal shoe-to-drum clearance automatically. Purpose-built for trailer applications — constant vibration, weather exposure, temperature extremes, and the loads of highway towing.

🔧 Select Your Side

Choose Left Hand (LH / Driver Side) or Right Hand (RH / Passenger Side) from the dropdown above. Tandem-axle trailers with brakes on both axles need a pair of each.

⚙️ Key Features

• Side-specific configuration: LH (driver) and RH (passenger) sold individually
• Self-Adjusting Mechanism: automatic shoe-to-drum clearance maintenance
• Complete Assembly: shoes, springs, magnets, hardware
• 5-Bolt Mounting: standard pattern — fits Lippert/LCI and AL-KO axles
• Fits 14-1/2" to 16-1/2" wheels

📐 Specifications

• Manufacturer: TRP
• Lippert Part Numbers: 122259 (Left Hand) / 122451 (Right Hand)
• Brake Size: 12" × 2"
• Axle Rating: 5,200–7,000 lbs
• Mounting: 5-bolt flange
• Adjustment: Self-adjusting

🔄 Cross Reference

• Dexter Equivalent: Dexter K23-180-00 (LH) / K23-181-00 (RH) — same brake size/fitment
• Dexter Nev-R-Adjust Equivalent: Dexter K23-464-00 (LH) / K23-465-00 (RH)
• Compatible Axles: Lippert/LCI, AL-KO, and most 5.2K–7K axles using 5-bolt flange pattern

🔧 Common Applications

• Cargo and utility trailers with LCI axles
• Axle refurbishment projects

⚠️ Important: Replace worn or damaged brake components promptly — a failure at highway speed endangers everyone on the road. Always replace brakes in matching pairs.

Questions? Call or text AAA Trailer at 517-225-1991 — we stock Dexter, Lippert, Ultra-Fab, and TruRyde brakes, hubs, and running gear. Same-day shipping from Howell, Michigan.

📞 Call/Text: 517-225-1991   🌐 AAATrailer.com

What sets us apart is our dedicated team of knowledgeable professionals who are always ready to assist. Great customer service isn't just a promise—it's the foundation of our success. We invite you to visit our showroom or reach out for personalized advice. Whether you're purchasing online or stopping by, we're here to make your trailer journey seamless. Visit Us Today

• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

Thank you for considering AAA Trailer. We're excited to help you hit the road with confidence! If you have any questions, don't hesitate to contact us.

To deliver your favorite products, we have partnered with the UPS & FEDEX . We are ready to entrust them with your orders and are always on your side if something goes wrong.

 We will be happy to assist you with eligible returns, the return instructions, and the shipping address. If you need a return or exchange, send us an email so we can discuss a replacement.