Dexter K71-2H-10-DDD 10 Inch Trailer Disc Brake Kit, One Axle Set, Dacromet Coated, Fits 3.5K-3.7K Axles

The Dexter K71-2H-10-DDD is a complete one-axle trailer disc brake kit built around a 10 inch integral hub and rotor design, where the hub and rotor are machined as a single one-piece unit rather than a separate hub bolted to a rotor. The kit covers both wheel ends of one axle and is finished in a Dacromet (DAC) coating, a corrosion-resistant plating applied to the rotor, caliper, and mounting bracket to help the assembly hold up against road salt, moisture, and general trailer-towing exposure.

Each side uses a caliper bracket that mounts to a standard 4-bolt brake flange, and the assembly is sized to fit inside 13 inch and larger trailer wheels. The wheel bolt pattern is 5 on 4.5 inches. This kit is intended for 3.5K-3.7K capacity trailer axles and comes as a full bearing and seal package rather than just brake hardware: it includes inner bearings, outer bearings, seals, dust caps, and lug nuts, so a single kit covers the rotating hardware for the axle along with the disc brake components.

Because bearing and seal requirements vary by axle manufacturer, note that UFP-brand axles require a different seal number than most of the rest of the trade uses for this same bearing set, which is called out below and in the FAQ so the correct seal ends up on the axle.

Specifications

• Brand: Dexter
• Manufacturer Part Number: K71-2H-10-DDD
• Product Type: Trailer Disc Brake Kit
• Axle Configuration: One Axle Kit (both wheel ends)
• Rotor Size: 10 inches
• Hub and Rotor Design: Integral one-piece hub and rotor
• Wheel Bolt Pattern: 5 on 4.5 inches
• Caliper Mounting: 4-bolt brake flange
• Wheel Clearance: Fits inside 13 inch and larger wheels
• Coating: Dacromet (DAC) corrosion-resistant coating
• Inner Bearing: L68149
• Outer Bearing: L44649
• Seal: 171255TB (168255 required for UFP axles)
• Included Components: Bearings, seals, dust caps, and lug nuts
• Axle Capacity: 3.5K-3.7K trailer axles
• Weight: 56.8 pounds
• UPC: 840327600404
• Assembly Required: Yes

Fitment

Designed for 3.5K-3.7K capacity trailer axles, and sized to fit inside 13 inch and larger trailer wheels.

Frequently Asked Questions

What does this kit include? The Dexter K71-2H-10-DDD is a complete one-axle kit that includes the integral hub and rotor units, calipers, mounting brackets, inner and outer bearings, seals, dust caps, and lug nuts for both wheel ends of the axle.

What axle capacity is this brake kit made for? This kit is sized for 3.5K-3.7K capacity trailer axles.

Does one kit cover both wheels on the axle, or just one side? Yes, the K71-2H-10-DDD is a one-axle kit, meaning it covers both wheel ends of a single axle, not just one wheel.

What size rotor does this kit use? It uses a 10 inch rotor, built as an integral one-piece hub and rotor rather than a separate hub and rotor bolted together.

Will this fit under a 13 inch wheel? The caliper and bracket assembly on the K71-2H-10-DDD is sized to fit inside 13 inch and larger trailer wheels.

What wheel bolt pattern does this kit use? The K71-2H-10-DDD uses a 5 on 4.5 inch wheel bolt pattern.

What coating is used on the brake components? The rotor, caliper, and mounting bracket are finished in a Dacromet (DAC) coating, which resists corrosion from road salt and moisture during towing.

What bearing and seal numbers come with this kit? This kit includes inner bearing L68149, outer bearing L44649, and seal 171255TB.

Does the seal number change depending on the axle brand? Yes. For the K71-2H-10-DDD kit, UFP-brand axles require seal number 168255, while the rest of the trade uses seal 171255TB with the same bearing set.

How does the caliper bracket mount to the axle? The caliper bracket on this kit mounts to a standard 4-bolt brake flange.

How much does this brake kit weigh? The complete Dexter K71-2H-10-DDD one-axle kit weighs 56.8 pounds.

Is assembly required for this kit? Yes, assembly is required to install the K71-2H-10-DDD components onto the axle.