Please Note, Dexter hubs underwent changes around 2009 and 2013, verify your trailer's manufacture date when ordering replacement parts. 10K axles are generally split into "General Duty" (3-3/8" wide brakes) and "Heavy Duty" (4" wide brakes), you will need the parts specifically designed for the 10K Heavy Duty (HD) axle. The bearings and brakes are also different.
The Dexter 10,000 lb General Duty (10K GD) trailer axle with electric brakes is commonly found on heavy-duty equipment trailers, goosenecks, flatbeds, dump trailers, and commercial hauling applications. Built for demanding loads and dependable braking performance, the 10K General Duty axle uses a 12¼" x 3⅜" brake profile, which differs from the 10K Heavy Duty (HD) and 12K axles, which use a wider **12¼" x 5" brake setup.
Knowing the most common replacement parts can make maintenance and repairs much easier.
Dexter Axle
1. Electric Brake Assemblies (12¼" x 3⅜")
Most Dexter 10K General Duty axles use forward self-adjusting (Nev-R-Adjust) brake assemblies mounted to a standard 7-bolt flange pattern.
Left-Hand (Driver Side) Brake Assembly
023-450-00
or kit number: K23-450-00
Right-Hand (Passenger Side) Brake Assembly
023-451-00
or kit number: K23-451-00
These complete pre-assembled backing plates are designed for easy replacement and dependable stopping performance.
Brake Shoe & Lining Kit
K71-499-00
Services one brake assembly and includes replacement friction components.
Replacement Magnet Kit
K71-377-00
Includes:
- Oval brake magnet
- Spring
- Retaining clip
Brake magnets are a common wear item and play a critical role in electric brake operation.
2. Hub, Drum & Bearing Components
Most Dexter 10K General Duty axles commonly use an oil-bath style hub & drum assembly.
Hub & Drum Assembly (8 on 6.5")
009-123-01
Features:
- Standard oil-bath design
- 8 on 6.5" bolt pattern
- 5/8" wheel studs
Unitized Oil Seal
010-051-02
Dimensions:
- 2.875" ID
- 3.880" OD
Maintaining a good seal is critical to protecting bearings from contamination and lubricant loss.
Bearings & Races
Inner Bearing (Cone):
#387A (Dexter Part: 031-019-02)
Inner Race (Cup):
#382A (Dexter Part: 031-019-01)
Outer Bearing (Cone):
#25580 (Dexter Part: 031-022-02)
Outer Race (Cup):
#25520 (Dexter Part: 031-022-01)
These heavy-duty tapered roller bearings are built to handle demanding towing applications.
Complete Master Wheel Bearing Kit
K71-722-00
Services one complete wheel end and commonly includes:
- Inner bearing
- Outer bearing
- Bearing races
- Unitized oil seal
Screw-On Hub Cap Kit
K71-148-00
Typically includes:
- Clear plastic oil cap
- O-ring
- Rubber fill plug
Oil bath caps allow quick inspection of lubricant condition and level.
3. Wheel Hardware
Press-In Wheel Stud
007-115-00
Specifications:
- 5/8"-18 thread
- 3" overall length
Standard Swivel Flange Lug Nut
006-109-00
Specifications:
- 5/8"-18 thread size
Proper wheel hardware is critical for safe towing and correct wheel retention.
4. Suspension Components
Most Dexter 10K General Duty axles commonly use 3" wide multi-leaf spring suspension systems.
Heavy Duty U-Bolt
007-246-00
Fits:
Standard 10K GD 3.5" diameter round axle tubes
U-Bolt Tie Plate
012-051-00
Designed for:
3" wide multi-leaf springs
Leaf Spring
072-044-01
Specifications:
- 30" overall length
- 3" wide
- 5-leaf slipper spring
Worn suspension parts can contribute to poor ride quality, uneven tire wear, and towing instability.
Common Replacement Wear Items
The most commonly replaced Dexter 10K General Duty axle parts include:
✔ Brake assemblies
✔ Brake magnets
✔ Brake shoes & lining kits
✔ Bearings & races
✔ Oil seals
✔ Hub & drum assemblies
✔ Hub caps & O-rings
✔ U-bolts & suspension hardware
Important Fitment Note
To confirm exact compatibility, always verify:
- Brake size (12¼" x 3⅜")
- Bearing numbers
- Seal dimensions
- Hub style
- Axle serial number
You can usually find the 9-digit Dexter serial number engraved directly onto the steel axle tube, which helps confirm exact fitment.
At Highway Trailer Company, we carry a large selection of Dexter 10K General Duty axle parts, including brakes, hub/drums, oil seals, bearings, suspension components, and replacement hardware to help keep your trailer hauling safely and reliably.