Product Description

The Dexter USA 12" Brake Drum (P/N 429402) is a genuine Dexter brake drum proudly manufactured in the USA, designed for 6,000 lb (approximately 2,720kg) trailer axles fitted with 12" × 2" electric or hydraulic drum brakes and the popular 6 × 139.7mm (LandCruiser) wheel pattern.

Manufactured in the USA to genuine Dexter engineering specifications, this precision-machined brake drum delivers reliable braking performance, exceptional durability and accurate fitment for both electric and hydraulic trailer braking systems.

The drum is supplied with six 1/2" UNF wheel studs pre-installed and is machined to suit the genuine Dexter bearing combination of 25580 inner and 15123 outer bearings.

Please note: This listing is for the brake drum only. Bearings, bearing cups (races), grease seal, grease cap, wheel nuts and installation hardware are sold separately.

Features & Benefits

• Genuine Dexter product
• Manufactured in the USA
• Part Number 429402
• Designed for 6,000 lb (2,720kg) trailer axles
• 12" × 2" Brake Drum
• Suits both electric and hydraulic brake systems
• 6 × 139.7mm (LandCruiser) wheel pattern
• Six 1/2" UNF wheel studs pre-installed
• Precision machined braking surface
• Machined for genuine Dexter bearing combination
• Trusted by trailer manufacturers worldwide

Specifications

Stud Pattern Explained

This brake drum uses the popular 6 × 139.7mm (6 × 5.5") LandCruiser wheel pattern, commonly found on heavy-duty Australian and imported trailers.

Before ordering, always confirm:

• Wheel stud pattern
• Wheel stud size
• Brake size
• Bearing numbers
• Axle capacity

Bearing Compatibility

This genuine Dexter brake drum is machined to suit the following genuine Dexter bearing combination:

For maximum reliability, we recommend replacing the bearings, bearing cups, grease seal and grease cap whenever installing a new brake drum.

Brake Compatibility

This brake drum is compatible with:

• Dexter 12" × 2" Electric Brake Backing Plates
• Dexter 12" × 2" Hydraulic Brake Backing Plates

Suitable for both electric and hydraulic drum brake systems.

Suitable Applications

Ideal for:

• Boat trailers
• Car trailers
• Caravans
• Horse floats
• Plant trailers
• Commercial trailers
• Imported American trailers fitted with Dexter 6,000 lb axles

Why Choose Genuine Dexter?

Genuine Dexter brake drums are manufactured in the USA to exact engineering tolerances and are trusted by trailer manufacturers throughout North America, Australia and around the world.

Designed for demanding towing applications, genuine Dexter components deliver:

• Manufactured in the USA
• Precision-machined braking surface
• Genuine Dexter fit and compatibility
• Suitable for both electric and hydraulic braking systems
• Long service life under heavy-duty towing conditions
• Trusted by trailer manufacturers worldwide

What's Included

• 1 × Genuine Dexter USA 12" Brake Drum
• 6 × 1/2" UNF Wheel Studs (Pre-installed)

What's Not Included

• Inner Bearing (25580)
• Outer Bearing (15123)
• Bearing Cups (Races)
• Grease Seal (XK71-305-00)
• Grease Cap (XK71-316-00 or XK71-317-00)
• Wheel Nuts
• Electric or Hydraulic Backing Plate

Will This Fit My Trailer?

Before ordering, confirm the following:

✔ Dexter 6,000 lb axle

✔ 12" × 2" drum brake system

✔ 6 × 139.7mm LandCruiser wheel pattern

✔ 1/2" UNF wheel studs

✔ Inner bearing 25580

✔ Outer bearing 15123

If these specifications match your existing brake drum, this product is suitable for your trailer.

Complete Your Installation

Bearings & Seals

• Dexter Bearing Kit (25580 / 15123)
• Grease Seal XK71-305-00
• Grease Cap XK71-316-00
• Grease Cap XK71-317-00

Brake Components

• Dexter 12" Electric Brake Backing Plates
• Dexter 12" Hydraulic Brake Backing Plates
• Dexter Brake Shoe Set

Workshop Items

• Marine Wheel Bearing Grease
  
• Wheel Nuts
• Castle Nuts

Common Replacement Parts

• Bearing Kit (25580 / 15123)
• Bearing Cups (Races)
• Grease Seal XK71-305-00
• Grease Caps XK71-316-00 & XK71-317-00
• Wheel Studs
• Brake Shoes

Installation Tips

• Install new bearing cups whenever replacing bearings.
• Replace the grease seal whenever the drum is removed.
• Pack bearings with quality marine wheel bearing grease.
• Inspect the spindle before installation.
• Adjust electric or hydraulic brakes according to the manufacturer's specifications.
• Torque wheel nuts to the manufacturer's recommended specification.

Frequently Asked Questions

Does this suit electric brakes?

Yes. It suits Dexter 12" × 2" electric brake systems.

Does this also suit hydraulic brakes?

Yes. It is compatible with Dexter 12" × 2" hydraulic brake systems.

What bearings does it use?

• Inner Bearing: 25580
• Outer Bearing: 15123

Are the bearing cups included?

No. Bearing cups (races) are sold separately.

What grease seal does it use?

Dexter XK71-305-00

Which grease cap does it require?

It can use either:

• XK71-316-00
• XK71-317-00

depending on your hub configuration.

Does it include wheel studs?

Yes. Six 1/2" UNF wheel studs are supplied pre-installed.

Where is this brake drum manufactured?

This is a genuine Dexter brake drum manufactured in the USA, built to Dexter's original engineering specifications for reliable fitment, durability and braking performance.

Why Buy From Trailer Spares Online?

• Genuine Dexter products
• Australia's trailer parts specialists
• Expert technical advice
• Fast Australia-wide shipping
• Large range of Dexter bearings and brake components
• Competitive pricing and local support