Looking for reliable 6 on 5.5″ hub kits to replace worn bearings on 5200-6000 lbs trailers? This guide highlights five well-matched options that fit 1.25″ to 1.75″ spindles with #42 tapered bearings. Each choice is best for common leaf-spring trailers and boat trailers requiring quick installation and durable protection against corrosion. The Top Picks table helps compare suitability at a glance, so you can choose the right kit for your axle, seals, and installation needs.
| Product | Best For | Why It Stands Out |
|---|---|---|
| RigsNParts 6 Lug Idler Hub Kits (Two Sets) | Dual-axle trailers needing complete spindles | Includes bearings, seals, nuts, and caps; strong corrosion resistance |
| LUXTRKSTO 6 Lug Hub Kit | Time-saving, prelubricated installs | Pre-installed bearings and seals; corrosion-resistant |
| iBroPrat 1 Set 6 Bolt Hub Kit | Easy install with included accessories | Pre-installed bearings and grease, dust caps and plugs |
| JADODE 6 On 5.5″ Hub Kit | Compact, ready-to-use kit | Includes grease seals and cap; ready for quick swap |
| GREPSPUD 2Sets 6 On 5.5” Hub Kit | Pre-lubricated, EZ-Lube ready | Pre-lubed bearings, complete set, clear sizing guidance |
RigsNParts 6 Lug Idler Hub Kit Pair
Best for two-axle trailers needing a complete hub replacement. The kit includes two 6 on 5.5″ hubs, two inner bearings (25580/25520) for the 1-3/4″ spindle, two outer bearings (15123/15245) for the 1-1/4″ spindle, grease seals, Ez-Lube grease caps, dust caps, and 12 hub nuts. It is designed for 5200 to 6000 lbs axles and uses carbon steel for durability in tough conditions. Best for installers seeking a ready-to-use, corrosion-resistant option. Limitations include the need for compatible spindles and proper torque during installation.
Who it’s best for: Professional mechanics installing dual hubs or fleet operators needing a straight swap with all hardware included.
LUXTRKSTO 6 Lug Trailer Hub Kit
Prelubricated and preinstalled bearings and seals simplify installation. This kit fits 6 on 5.5″ axles rated between 5,200 and 6,000 lbs and supports 1-1/4″ to 1-3/4″ spindles with 2.25″ ID seals and 25580/15123 bearings. Good choice when you want a time-saving, low-maintenance upgrade that resists rust and water pollution. Caution: verify spindle size and bolt pattern before ordering to avoid mismatches.
Who it’s best for: Do-it-yourselfers aiming for a quick, prelubricated upgrade on single or light fleet trailers.
iBroPrat 1 Set 6 Bolt Hub Kit
This kit includes preinstalled bearings (25580/15123) and 2.25″ grease seals, along with dust caps and rubber plugs, making it a convenient all-in-one option. It is designed for 5.5″ bolt patterns on 5200-6000 lbs axles and fits 1-1/4″ to 1-3/4″ spindles. Best for buyers who want a straightforward swap with minimal extra parts. Limitation: ensure your spindle and seal sizes match the kit’s specifications before purchase.
Who it’s best for: Home mechanics and small businesses performing straightforward hub replacements.
JADODE 6 On 5.5″ Trailer Idler Hub Kit
Set of two hub kits for 6 on 5.5″ bolt patterns, suitable for 5200-6000 lbs axles. Features include preinstalled inner and outer bearings (25580/25520 and 15123/15245), grease seals, and EZ-Lube caps. The kit is ready for installation with 12 studs and nuts already in place. Best for buyers prioritizing an all-in-one replacement and clear sizing instructions. Limitation: verify that your axle’s inner bearing diameter matches 25580 and outer diameter matches 15123 for compatibility.
Who it’s best for: Fleet managers looking for compact, easily swappable units with minimal extra parts.
JADODE 6 Bolt Hub Kit For 6000 Lbs Axles
Designed for 6 on 5.5″ patterns with 6000 lbs axles, this kit includes two bearing races (25580/25520 inner, 15123/15245 outer) and 2.25″ ID grease seals, plus 2.44″ EZ-Lube grease caps and other hardware. It provides a reliable, ready-to-install solution for higher-capacity trailers. Caution: confirm that the spindle length and diameter align with the kit before ordering to avoid fit issues.
Who it’s best for: Operators of heavier trailers needing a robust, ready-to-install replacement hub set.
RigsNParts 6 On 5.5″ Idler Hub Kit Duo
A two-hub package for 5200 to 6000 lbs axles, matching 1-1/4″ to 1-3/4″ spindles with 2 x 25580 inner bearings, 2 x 15123 outer bearings, and complete zinc-coated hardware. This option is best for buyers operating dual-wheel trailers who want a balanced, identical replacement for both sides. Caution: ensure a proper balance of hubs on both sides to avoid uneven wear.
Who it’s best for: Owners replacing both hubs at once or outfitting a small fleet with standardized parts.
Buying Guide
What size spindle and bolt pattern do I need?
Confirm the spindle diameter (commonly 1-1/4″ to 1-3/4″ on #42 spindles) and the bolt pattern (6 on 5.5″ in these kits). Choosing the wrong size prevents proper bearing seating and seal fit.
Prelubricated vs. unlubricated kits
Prelubricated sets save time and reduce installation effort, especially if you lack the tools to grease bearings on-site. If you maintain trailers in harsh climates, pre-lubed options can offer longer initial protection against moisture.
Included hardware and seals
Look for kits that bundle seals, dust caps, nuts, cotter pins, and grease caps. Missing pieces can require extra trips to the parts store and may complicate installation.
Corrosion resistance and material quality
Kits using corrosion-resistant materials or protective coatings help in marine or salted-road environments. Carbon steel with proper seals generally offers solid longevity, but verify sealing specs for water exposure.
Installation considerations
Consider whether you need a simple swap or a full spindle replacement. Some kits include spindles, inner/outer bearings, and preinstalled seals, while others focus on bearings and seals only. Matching the method to your skill level ensures a safer, faster repair.
Typical limitations to watch for
- Ensure compatibility with your axle’s inner/outer bearing sizes (25580/15123, 25520/15245, etc.).
- Check spindle length and end welds to guarantee proper seating.
- Verify the kit includes the correct number of nuts and caps for your axle side count.
FAQ
- Q: Are these kits universal for all 6 on 5.5″ axles? A: They fit many common 5200-6000 lbs axles with #42 spindles, but confirm bearing sizes and seals before purchasing.
- Q: Do the kits include spindles? A: Some kits include spindles; others are bearing-and-seal sets. Check each product’s features to confirm.
- Q: Can I install these without specialized tools? A: Prelubricated and preassembled kits reduce tool needs, but standard wheel and bearing installation tools are still recommended.
- Q: Is pre-lubrication important for longevity? A: Yes, pre-lubed bearings can provide immediate protection and simplify early-life maintenance.
- Q: How do I choose between two kits for a dual-axle trailer? A: For even wear and balance, select identical hubs on both sides and consider buying a paired set when available.
- Q: What maintenance is recommended after installation? A: Periodic inspection of seals and grease levels helps prevent moisture intrusion and wear.