4Sets Trailer Hub Bearings Kit for 1-3/8ft to 1-1/16ft Tapered Axles

In this review of the 4Sets L68149 L44649 Trailer Hub Bearings Kit the bottom line is clear: this kit is aimed at trailer owners and DIY mechanics who need a complete, reliable set of spindle bearings and seals for a 3500 lb trailer with a #84 spindle. The reviewer found the kit notable for its completeness and heavy duty materials, making it a straightforward replacement option that reduces hub friction and brings a noticeably quieter, steadier tow when installed correctly.

Key Features

• Compatibility: Designed specifically for 3500 lb trailers with 1-1/16' to 1-3/8' tapered axles and spindle #84, so owners can match parts without guesswork.
• Complete kit: Includes bearings, races, grease seals, spindle nuts, washers, cotter pins, dust caps and rubber plugs to cover four hubs and reduce trips to the parts store.
• Durable bearings: Chrome steel construction and low wear design provide quieter rotation and longer service life under normal towing loads.
• Double lip grease seals: Seals include a reinforced spring behind the lip to retain grease and help prevent water and dust ingress for improved longevity.
• Good packaging: Parts arrive neatly arranged in bubble wrap and a sturdy box, limiting deformation and damage in transit.

Who It's For

This kit is best for owners of small to medium trailers rated at 3500 lb who maintain their own equipment or perform multiple repairs, since the 40-piece set supplies parts for four hubs and includes spares. It is also useful for small fleet operators who want a value-for-money set to keep on hand for routine maintenance.

It is not the ideal choice for heavier commercial trailers beyond 3500 lb, or for applications that require a different spindle number or non-tapered axles. Users unfamiliar with hub press-fitting should note the dust cap is intentionally slightly oversized and may need a wood block or rubber mallet to seat without denting.

Pros & Cons

Pros

• Complete 40-piece set covers four hubs, saving time and additional purchases.
• Chrome steel bearings and double lip seals offer low vibration and better grease retention for quieter towing.
• Neat, protective packaging reduces risk of shipping damage to delicate parts.
• Includes installation hardware such as spindle nuts, washers and cotter pins for a full rebuild.

Cons

• Dust caps are slightly oversized by design and require careful seating with a wood block or mallet to avoid denting.
• Intended only for 1-1/16' to 1-3/8' tapered axles and spindle #84, so compatibility is limited.

Specifications

Fitment	3500 lb trailers, 1-1/16' to 1-3/8' tapered axles, spindle #84
Included parts	40 pcs: bearings, races, seals, nuts, washers, cotter pins, dust caps, rubber plugs
Bearing types	L68149, L44649 (with matching races)
Grease seal size	171255TB seals (approx 1.719' I.D. x 2.565' O.D.)
Dust caps	4 pcs, slightly oversized by design for firm fit
Material highlights	Chrome steel bearings, double lip grease seals with reinforced spring

Our Verdict

The 4Sets trailer hub bearings kit is a practical, cost-effective option for 3500 lb trailer owners who need a full set of bearings and hardware for four hubs. Its durable chrome steel bearings, complete hardware and protective packaging make it good value for routine maintenance or multiple repairs, provided buyers confirm fitment to spindle #84 and are comfortable with the slight fuss of seating the dust caps.

Frequently Asked Questions

Will this kit fit my trailer?
It fits trailers rated 3500 lb with 1-1/16' to 1-3/8' tapered axles using spindle #84; verify your spindle number before purchase.

Are the seals leak resistant?
Yes, the kit uses double lip grease seals with a reinforced spring to help retain grease and reduce water and dust entry.

Do I need special tools to install the dust caps?
You should use a wood block and hammer or a rubber mallet to seat the slightly oversized dust caps to avoid denting the cap.