Trailer Idler Hub Kits 5 on 4.5 for 3500 lb Axle - Set of 2

In this review of the Trailer Idler Hub Kits 5 on 4.5 for 3500 lb axle, the bottom line is straightforward: these kits are aimed at trailer owners who need a complete, ready-to-install idler hub solution for most 3500 lb axles. The reviewer found the biggest reason to buy is the included hardware - bearings, grease seals, grease caps and cone nuts - which reduces hunting for compatible parts. Fit and basic quality stand out, making these kits a practical option for routine axle maintenance or replacement on boat and utility trailers.

Key Features

• Complete kit: Each set includes inner and outer cone bearings, grease seals, grease caps and cone wheel nuts so installers get most of what is needed in one purchase.
• Bolt pattern compatibility: The 5 on 4.5" bolt pattern fits common trailer hubs, simplifying swaps on many 3500 lb axle setups.
• Threaded hardware: The 1/2"-20 cone wheel nuts and installed studs match standard trailer spindle threads for straightforward installation.
• Bearing fit: Built for 84 spindles with a 4-hole brake flange using inner bearing L68149 and outer bearing L44649, ensuring correct bearing pairing for these spindles.
• Installed races: Bearing races come preinstalled in the hubs, which reduces assembly time and lowers the chance of incorrect race seating during installation.

Who It's For

This kit is best for DIY trailer owners, boat owners and small fleet maintenance teams working on 3500 lb axles who want a mostly complete idler hub replacement that fits common spindle and brake flange arrangements. The included bearings and seals are convenient for users who prefer to buy a matched set rather than sourcing individual parts.

Those who should look elsewhere include owners of heavier axles or nonstandard bolt patterns, and anyone who requires hubs with integrated brakes or specialized materials; this product is an idler hub kit for 3500 lb axles rather than a brake-ready hub or a custom OEM unit.

Pros & Cons

Pros

• Good value for a set that includes bearings, seals, grease caps and cone nuts, reducing extra purchases.
• Fits common 5 on 4.5" bolt pattern hubs and most 3500 lb trailer and boat axles.
• Bearing races and studs installed save time during installation and help ensure proper fit.

Cons

• Assembly instructions received mixed feedback from customers, so installers should be comfortable with basic hub assembly or consult a mechanic.

Specifications

Our Verdict

The Trailer Idler Hub Kits 5 on 4.5 for 3500 lb axle are a practical, cost-effective choice for most trailer owners who need a matched pair of idler hubs with bearings and seals included. They offer good fitment for common spindles and save time with preinstalled races and studs, making them solid value for routine axle maintenance when paired with competent installation or shop support.

Frequently Asked Questions

Do these hubs fit brake flanges?
They are built for 84 spindles with a 4-hole brake flange and are compatible with that configuration, but they are idler hubs without integrated brakes.

What bearings come with the kit?
Each hub kit includes inner cone bearing L68149 and outer cone bearing L44649 as specified.

Are grease caps and nuts included?
Yes, the set includes E Z lube grease caps with rubber plug and 10 cone wheel nuts with 1/2 in-20 thread.