AIUWIZO 3500 lb 5-Lug Trailer Hub Kit 5 on 4.5" — 2-Set for #84 Tapered Spindle (1-1/16"–1-3/8") with Bearings & Seals

AIUWIZO 2-set 3500 lb 5-lug trailer hub kit is a complete, heavy-duty idler hub assembly designed to fit 5 on 4.5" bolt patterns and #84 tapered spindles (fits 1-1/16" to 1-3/8").

Replace worn hubs or assemble a dependable axle with a ready-to-install pair of hubs built for 3,500-pound trailer axles. This kit includes bearings, seals, fasteners and dust covers so you get everything needed for a correct installation for most utility and boat trailers that use a 5-lug, 4.5" bolt pattern. The hubs are intended for tapered spindles only — they are not compatible with straight spindles.

How do I confirm this hub fits my trailer spindle?

Measure your spindle diameter and bolt pattern before ordering. This assembly fits tapered spindles sized between 1-1/16" and 1-3/8" and uses a 5 on 4.5" bolt pattern (measure center-to-center across outer holes).

• Check spindle type: tapered only (not for straight spindles).
• Measure spindle diameter at the bearing seat: must fall in the 1-1/16"–1-3/8" range.
• Confirm bolt pattern: 5 lug, 4.5" (measure from outermost hole to center of opposite hole).
• Match load rating: intended for 3,500 lb trailer axles.

What parts are included and what maintenance will keep them working?

This kit ships as a complete set so you can swap both hubs without sourcing additional components. Basic care—regular inspections and greasing—extends service life.

• Included: 2 hubs, inner & outer bearings (L68149 & L44649), 2 grease seals, 2 spindle nuts, 10 lug nuts (1/2"-20), 2 washers, 2 cotter pins, 4 dust caps, and 4 spare rubber plugs.
• Packaging: extra protective layers to limit transit damage and keep components straight.
• Maintenance: repack bearings annually or every 3,000 miles; inspect seals and fasteners before travel.

How difficult is installation and what tools or techniques help?

Installation is straightforward for anyone familiar with wheel-end service, but follow the sequence provided with the kit to ensure proper bearing preload and seal seating. Use the right tools to avoid damage.

• Use a torque wrench for spindle and lug nut tightening to manufacturer specs.
• For dust caps, tap on with a wood block and rubber mallet to prevent dents.
• Always install new seals and repack bearings with high-quality wheel bearing grease.
• Verify cotter pin alignment and that the hub spins smoothly without play.

Why choose this AIUWIZO hub kit over individual parts?

Buying the complete two-hub set ensures component compatibility and eliminates mismatched parts or missing fasteners. The kit is packaged to protect parts and includes spare plugs for long-term dust protection.

• One vendor for all wheel-end components reduces installation errors.
• Premium carbon steel construction resists corrosion and wear.
• Sealed dust cover design helps keep contaminants out of bearings.
• Extras like spare rubber plugs and full protective packaging add value.

Who is this for: This hub assembly set is intended for trailer owners, mechanics, and DIYers replacing or upgrading wheel ends on 3,500 lb axles that use a 5-lug 4.5" bolt pattern and #84 tapered spindles. If your trailer uses straight spindles or a different bolt pattern, choose a kit matched to those specifications. Follow the included instructions and routine maintenance guidance for safe, long-lasting performance.