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Lippert 814203 12-Inch Brake Hub Assembly 8 on 6.5 Bolt Pattern 1/2-Inch Stud 7000 Lb Axle Rating

Lippert 814203 12-inch brake hub assembly with 8 on 6.5-inch bolt pattern and 1/2-inch studs rated for 7,000 lb trailer axles
Lippert 12" Brake Hub Assembly - 8 On 6.5" Bolt Pattern, 1/2" Stud - 7,000 Lbs
 
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Part Number: 814203
Manufacturer: Lippert

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Lippert 7,000 Lb Axle Rating Fully Assembled Lippert 814203 -- 12-Inch Brake Hub Assembly, 8 on 6.5-Inch Bolt Pattern, 1/2-Inch Stud

A ready-to-install replacement brake hub for heavy-duty trailer and RV axles rated to 7,000 lbs. Bearing cones, seals, and grease are pre-installed at the factory -- no bench pressing, no guesswork. Matches Lippert and compatible OEM axle assemblies with the 8 on 6.5-inch bolt pattern common on fifth wheels, travel trailers, and gooseneck trailers.

Drop-In Replacement for 7,000 Lb Trailer Axle Hubs

The Lippert 814203 (vendor part 08-7937) is engineered as a direct replacement for worn or damaged brake hubs on 7,000 lb trailer axles. The hub arrives fully assembled -- bearing cones pressed in, grease seals installed, and packed with grease -- so installation comes down to cleaning the spindle, sliding the hub on, and torquing the castle nut. No special tools or press work required on the job site.

The solid iron construction delivers the strength and heat dissipation needed for repeated braking on heavy trailers. The 8-lug, 6.5-inch bolt circle is a widely used pattern on larger RV and commercial trailer applications, giving this hub broad cross-platform fitment across Lippert axle families and many compatible aftermarket axles.

Pre-Packed and Ready

Bearing cones, seals, and grease are factory-installed. Mount and torque -- no additional prep needed before installation.

Solid Iron Construction

Durable cast iron hub withstands heavy load cycles and provides reliable heat management during extended braking.

8 on 6.5-Inch Bolt Pattern

Matches the standard heavy-trailer 8-lug bolt circle. Compatible with 16-inch to 17.5-inch wheels using 1/2-inch lug nuts.

7,000 Lb Axle Rating

Rated for axles up to 7,000 lbs. Correct for single-axle heavy trailers or one end of a tandem 14,000 lb setup.

Fitment and Compatibility

This hub is designed for use on 7,000 lb rated trailer axles using the 8 on 6.5-inch (203 mm) bolt pattern. This bolt pattern is common on:

  • Lippert-brand trailer axles at the 7,000 lb rating
  • Heavy-duty fifth-wheel and travel trailer applications (30-foot-plus rigs on tandem or triple axle configurations)
  • Gooseneck trailers and equipment haulers using compatible Lippert or Dexter-style spindles
  • Aftermarket replacement axles matching the spindle taper and bearing seat dimensions of the Lippert 7K axle family
Factory-Assembled Convenience: Unlike bare hubs that require a press and bearing driver to install races and cones, the 814203 ships with inner and outer bearing cones seated, grease seals installed, and the interior pre-packed with bearing grease. This is a direct bolt-on replacement for qualified mechanics and confident DIYers alike.

Wheel Compatibility

The 8 on 6.5-inch bolt pattern with 1/2-inch studs is compatible with 16-inch and 17.5-inch trailer wheels using standard 1/2-inch-20 lug nuts. Always verify your wheel's center bore (hub-centric fit) and lug seat style before swapping hubs. Most trailer wheels in this size range use a conical (tapered) lug seat -- confirm your wheel matches before installing.

Stud Size Note: The 814203 uses 1/2-inch wheel studs. Verify your existing lug nuts are 1/2-inch-20 thread before ordering. Do not use lug nuts from a metric or different thread-pitch application.

Installation Overview

Hub replacement on a trailer axle follows a standard procedure. Always chock wheels, support the trailer on rated jack stands, and use a torque wrench for the final castle nut setting.

  • Remove the wheel, then pull the dust cap, cotter pin, and castle nut
  • Slide the old hub assembly off the spindle and inspect spindle for scoring or wear
  • Clean the spindle journal surface thoroughly before installing the new hub
  • Slide the 814203 hub assembly onto the spindle -- inner bearing and seal are already in place
  • Install the outer bearing (already in the hub), washer, and castle nut
  • Torque castle nut to specification, then back off to align cotter pin hole -- do not leave the bearing preloaded
  • Install cotter pin and dust cap, then remount wheel and torque lugs in a star pattern
Torque Specification: Trailer hub castle nuts are typically torqued to 50-100 ft-lb during initial seating, then backed off to the nearest cotter pin slot with zero preload (free-spinning bearing). Consult the axle manufacturer's torque spec for your specific spindle. Improperly adjusted bearing preload causes premature failure.
Maintenance Tip: Even though this hub ships pre-greased, inspect grease condition and bearing play every 12 months or 12,000 miles, whichever comes first. Repack or replace if grease appears dark, watery, or contaminated. Replace the grease seal any time the hub is removed from the spindle.

Part Identification

ManufacturerLippert
Part Number (SKU)814203
Vendor Part Number08-7937
UPC848150010346
WarrantyLimited 1-Year Manufacturer Warranty

Hub Specifications

Hub Diameter12 inches
Axle Weight Rating7,000 lbs
Bolt Pattern8 on 6.5 inches (8 x 165.1 mm)
Number of Lugs8
Stud Size1/2 inch (1/2-20 thread)
Hub MaterialSolid cast iron
Assembly Weight1.5 lbs

Wheel Fitment

Compatible Wheel Diameter16 inch to 17.5 inch
Lug Nut Thread1/2-20
Lug Seat StyleConical (tapered) -- verify with your wheel

What Is Included

Hub AssemblyPre-assembled cast iron hub
Bearing ConesInner and outer cones pre-installed
Grease SealsInner seal pre-installed
Bearing GreasePre-packed at factory
Dust CapNot specified -- verify before ordering if needed
Cotter Pin / Castle NutNot included -- reuse or source separately

Brake Drum Dimensions

Drum Diameter12 inches (standard for 7K axle applications)
Brake Type CompatibilityElectric drum brake (compatible with standard 12-inch brake shoes for 7K axles)
Important Information -- Read Before Installing
  • This hub is rated for axles up to 7,000 lbs. Do not install on axles with a higher weight rating.
  • Verify your bolt pattern is exactly 8 on 6.5 inches before ordering. Using an incorrect hub can cause wheel separation and loss of vehicle control.
  • Stud thread is 1/2-20. Confirm your lug nuts match before installation.
  • Replace the grease seal any time the hub is removed from the spindle -- even a hub that has only been on briefly should have the seal replaced before reinstallation.
  • Always use a torque wrench and follow the axle manufacturer's castle nut torque spec. Overtightening causes bearing damage; undertightening causes hub loss.
  • Do not reuse cotter pins. Always install a new cotter pin after castle nut adjustment.
  • Inspect spindle journals and spindle nut threads for damage before installing. A damaged spindle will destroy a new hub assembly in short order.
  • Compatible with electric drum brakes -- not intended for hydraulic surge brake or disc brake axle configurations without engineering verification.


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