4 Sets 3500 LB Boat Trailer Axle Bearing Kits for #84 Spindle

In this review the reviewer looks at a comprehensive trailer axle bearing kit aimed at owners of single or tandem boat trailers with a #84 spindle and 3500 lb capacity. The kit stands out because it supplies four complete sets of bearings and races plus grease seals, spindle nuts and removable dust caps, so the single biggest reason to buy is the convenience of a full, ready-to-install replacement set that covers multiple hubs and keeps spare parts on hand for roadside repairs.

Key Features

• Complete 4-set coverage: Includes four sets of bearing and race pairs so a single purchase covers multiple hubs or a tandem trailer rebuild without sourcing parts separately.
• Correct fit range: Designed for 1-1/16' to 1-3/8' trailer axles and the #84 spindle, which reduces compatibility guessing for common 3500 lb single-axle trailers.
• Included accessories: Comes with grease seals (171255TB), dust caps, rubber plugs, spindle nuts, cotter pins and washers so installers get every small part needed for assembly and future maintenance.
• Durable construction: Bearings and seals are manufactured to minimize noise and leaks, delivering long service life under marine trailer conditions.
• Well packed for shipping: Parts arrive in heavy-duty box with bubble wrap to prevent damage from parts colliding during transit.

Who It's For

This kit is ideal for boat owners, DIY mechanics and small repair shops who need to replace hub bearings on trailers that use the #84 spindle or those who want spare sets for multiple trailers. The four-set configuration is especially useful for tandem trailer rebuilds or keeping emergency spares on board during extended trips.

It is not aimed at owners of heavy-duty axles outside the 3500 lb/#84 spindle range or those who require metric-specific bearings; buyers should confirm their spindle and axle dimensions fall within the stated 1-1/16' to 1-3/8' range before purchasing.

Pros & Cons

Pros

• Comprehensive kit includes bearings, races and seals for four hubs, offering strong value for multi-hub work.
• All small hardware such as spindle nuts, cotter pins, dust caps and washers are provided, reducing additional purchases.
• Precision manufacturing yields low operating noise and durable grease seals that resist leakage.

Cons

• Some users reported concern about the spindle nut quality, so shops may choose to reuse OEM nuts if preferred.

Specifications

Our Verdict

This bearing kit is a practical choice for boat trailer owners who want a full-service repair pack and some spares at a lower cost than buying parts individually. It provides the right bearing sizes and all accessory hardware for most #84 spindle 3500 lb trailers, making it good value for DIYers and small shops, though buyers who prioritize aftermarket nut grade may want to inspect or replace the supplied spindle nuts.

Frequently Asked Questions

Will this kit fit my trailer?
Check that your axle measures between 1-1/16' and 1-3/8' and that you use a #84 spindle; the kit is made for that exact range.

Does the kit include seals and caps?
Yes, it includes 171255TB grease seals, 1.98' dust caps, rubber plugs and cotter pins along with spindle nuts and washers.

How many hubs does the kit cover?
The package contains four complete sets of bearings and accessories, enough for four hubs or a tandem axle rebuild with spares.