The Dexter 7,000 lb axle is one of the most common heavy-duty trailer axles found on equipment trailers, dump trailers, enclosed cargo trailers, flatbeds, and goosenecks. Knowing the common replacement parts on a Dexter 7K axle can make maintenance, repairs, and ordering parts much easier.
Here are the parts most commonly found on a typical Dexter Axle 7,000 lb axle setup.
1. Bearings
Most Dexter 7K axles commonly use:
Inner Bearing: 25580
Outer Bearing: 14125A
These are very common heavy-duty trailer bearings designed for higher load capacities.
Regular inspection and greasing help prevent overheating and bearing failure.
2. Grease Seal
A common grease seal found on many Dexter 7K axles is:
10-36 Grease Seal
- 2.250" inner diameter
- 3.376" outer diameter
However, always verify seal size before ordering since some axle variations exist.
3. Hub & Drum Assembly
Most 7,000 lb Dexter axles use:
- 8 on 6.5 bolt pattern
- Hub & drum combination for electric brakes
- Heavy-duty cast drum construction
- 1/2" or 9/16" studs are most common
Some trailers may use idler hubs depending on the application, but brake axles are far more common.
4. Electric Brakes
Most Dexter 7K axles use:
12" x 2" electric brake assemblies
K23-180-00 and K23-181-00
Common features include:
- Left-hand and right-hand brake assemblies
- 5-bolt mounting flange
- Self-adjusting or manual-adjust options
Electric brake systems are one of the most frequently serviced components on heavy-duty trailers.
5. Brake Drums
Brake drums on a typical 7K axle are usually:
- 12" diameter
- 8-lug configuration
- Pre-installed races in many assemblies
Complete hub/drum kits are often replaced during major brake service.
6. Dust Caps
Common dust cap options include:
- Standard drive-in caps
- EZ Lube grease caps (for Dexter EZ Lube spindles)
If your spindle has a grease zerk fitting through the center, it likely uses an EZ Lube system.
7. Suspension Components
Many 7K tandem axle trailers commonly use:
72-32 26.5" Spring or E5115 29.5" Spring
- Heavy-duty leaf springs
- Equalizers
- Shackle straps
- Suspension bolts or wet bolt kits
- Bronze or nylon bushings
Worn suspension parts can lead to uneven tire wear and rough towing.
8. Spindle Type
Most Dexter 7K axles commonly use a #42 spindle, which determines:
- Bearing fitment
- Hub compatibility
- Seal size
- Brake setup
Spindle identification is important when ordering replacement parts.
9. Common Replacement Wear Items
The most frequently replaced Dexter 7K axle parts include:
✔ Bearings & races
✔ Grease seals
✔ Brake assemblies
✔ Hub/drum assemblies
✔ Dust caps
✔ Suspension hardware
✔ Brake magnets
Routine maintenance helps avoid costly roadside failures and improves trailer safety.
Always Verify Before Ordering
Not all 7,000 lb axles are identical.
Before ordering parts, confirm:
- Bearing numbers
- Seal size
- Bolt pattern
- Brake dimensions
- Axle manufacturer
- Spindle type
Even small differences can affect compatibility.
At Highway Trailer Company, we stock a large selection of Dexter 7K axle parts including bearings, brakes, hub/drums, seals, suspension components, and hardware to help keep your trailer road-ready.