Trailer Idler Hub Kits 5 on 5in Bolt with #84 Spindle - 3500 lb fit

In this review of the Trailer Idler Hub Kits with 5 on 5' bolt pattern and #84 spindles, the bottom line is simple: this set is aimed at trailer owners who need a full, ready-to-install hub and spindle solution for 3500 lb axles and want strong, corrosion-resistant components without replacing the entire axle. The kit includes two #84 spindles, two 5 on 5' idler hubs and all bearings, seals, nuts and grease caps, which makes it a convenient single purchase for axle repairs or upgrades and the main reason many will choose it.

Key Features

• #84 Spindle: The included spindles have a largest diameter of 1.75 in and an overall length of 8.25 in, providing the correct fit for axles that match the #84 profile.
• 3500 lb Application: Each spindle is rated for 1750 lb per wheel, making the kit suitable for standard 3500 lb trailer axle setups when used as a matched pair.
• Complete hardware set: The package contains bearings, grease seals, cotter pins, spindle nuts, washers, EZ lube grease caps and wheel nuts, so there is no need to source additional parts.
• Alloy steel construction: The hubs and spindles use alloy steel for improved corrosion resistance and durability compared with untreated components.
• Bubble boxed shipping: Each hub is packaged in bubble boxes to reduce the chance of damage in transit and help ensure parts arrive ready for installation.

Who It's For

This kit is best for DIY trailer owners, small fleet operators and repair shops that maintain 3500 lb trailers and need a matched pair of idler hubs and spindles with all required bearings and seals. It suits users who prefer to replace hub assemblies rather than rebuild single components because the kit bundles everything needed for a straightforward swap.

Those who should look elsewhere include owners of trailers that do not use a 5 on 5' bolt pattern or that require a different spindle profile than #84, and anyone who needs higher-capacity axle components than the 1750 lb per wheel rating provided here.

Pros & Cons

Pros

• Complete kit includes spindles, hubs, bearings, seals and grease caps, reducing parts hunting.
• Alloy steel construction offers better corrosion resistance and durability for trailer use.
• Spindles and hubs are packaged to minimize shipping damage, helping parts arrive in good condition.

Cons

• Installation feedback is mixed among customers, so those without mechanical experience may find fitting more challenging.

Specifications

Application	3500 lb trailer axles
Spindle model	#84
Spindle largest diameter	1.75 in
Spindle overall length	8.25 in
Spindle capacity	1750 lb per wheel
Bolt pattern	5 on 5 in
Included bearings and seals	L68149 inner, L44649 outer, 1.719 I.D x 2.565 O.D grease seals

Our Verdict

The Trailer Idler Hub Kits with 5 on 5' hubs and #84 spindles are a practical, cost-effective choice for anyone maintaining 3500 lb trailer axles who needs a complete replacement kit. With alloy steel parts, full hardware included and careful packaging, it offers solid value for the price, though buyers should be comfortable with mechanical installation or have access to professional help.

Frequently Asked Questions

Will these fit my axle?
They fit axles that accept a #84 spindle and use a 5 on 5 in bolt pattern; confirm spindle diameter and length against your hub or spindle spec.

Does the kit include bearings and seals?
Yes, the package contains inner L68149 and outer L44649 cone bearings plus 1.719 I.D x 2.565 O.D grease seals and other hardware.

Are grease caps included?
Yes, two EZ lube grease caps with rubber plugs are included for easy servicing.