iBroPrat Trailer Hub Kit 5‑Bolt 4.5" for 3,500 lb Axles — Pre‑Lubricated, Pre‑Assembled Hubs

iBroPrat Trailer Hub Kit 5 on 4.5 is a pre-assembled, pre-lubricated hub set for 3,500 lb trailer axles that includes bearings, seals, caps and hardware for straightforward replacement or upgrade.

Replace a worn idler hub or build a reliable trailer axle with this complete 5-bolt, 4.5" bolt pattern hub kit. Designed to fit standard 3,500 lb axles (spindle sizes 1-1/16" to 1-3/8") and shipped with bearings pre-greased and protected, the kit reduces installation time and helps prevent early leakage or contamination. The hubs are manufactured to U.S. G3000-like standards with anti-rust surface treatment and precision bearings for smoother operation and quieter rolling.

How do I confirm this hub fits my trailer?

Measure your existing hub bolt pattern and spindle diameter before ordering. This kit is for a 5-lug wheel with a 4.5" (A) bolt circle and fits spindles that accept L44649 (outer, 1-1/16" ID) and L68149 (inner, 1-3/8" ID) bearings. If you are unsure how to measure, use the provided diagram reference or compare the bearing numbers on your current hub.

• Bolt pattern: 5 x 4.5" (A = 4.5", D = 2-5/8")
• Bearing set: L44649 (outer) and L68149 (inner)
• Spindle compatibility: 1-1/16" to 1-3/8"
• Designed for 3,500 lb trailer axle (#84 spindle)

What comes pre-installed and how does that help during installation?

All small parts in the kit arrive pre-installed and the bearings are pre-packed with grease, so you save time and reduce the chance of assembly errors. The hubs are sealed with protective caps and the dust caps have a machined taper to ease fitment. Pre-lubrication and sealed packaging also limit grease loss during shipping and the risk of contamination at the job site.

• Bearings pre-greased and protected by plastic caps
• Dust caps ground with tapered edge for easier seating
• Includes nuts, washers, cotter pins, seals and rubber plugs
• Two hubs per order — ready to mount on the axle

What materials and durability features are included?

The hubs are forged from carbon steel with an anti-rust surface treatment, while the bearings are made of high-quality bearing steel and engineered for lower noise and long wear. The grease seals use a double-lip design to minimize leakage and keep contaminants out, extending service life when maintained properly. Packaging is heavy-duty with individual bubble bags to prevent damage in transit.

• Carbon steel hub body with anti-corrosion finish
• Precision bearing steel for quiet operation
• Double-lip grease seal to reduce leakage
• Secure, padded packaging to protect components

Which parts are included with the kit and why are they useful?

The kit ships complete so you won’t need to source additional small parts: it contains two hubs and the entire hardware set for both sides of an axle. That makes it convenient for axle swaps or replacing both hubs at once to maintain balanced performance. Always verify the included bearing numbers against your trailer specifications before installing.

• 2× 5-bolt 4.5" hubs for 3,500 lb axles
• 2× L44649 and 2× L68149 bearings (pre-greased)
• 2× grease seals, 2× dust caps, 10× lug nuts, washers, spindle nuts, cotter pins
• 2× rubber plugs and protective bubble packaging

Who is this for: The iBroPrat 5 on 4.5 hub kit is aimed at DIY trailer owners, repair shops, and fleet managers who need a complete, pre-assembled replacement for 3,500 lb trailer axles. It suits anyone replacing worn idler hubs or upgrading axle assemblies who wants a ready-to-install solution that reduces hands-on assembly and minimizes installation guesswork.