iBroPrat Galvanized Trailer Idler Hub Kit 5-on-4.5" 2-Set for 3,500 lb axles — pre-assembled, pre-lubricated

This dual-hub kit supplies everything needed to replace or upgrade the idler hubs on a 3,500 lb trailer axle. Each set includes two hot-dip galvanized hubs plus bearings, seals, lug nuts and hardware, delivered pre-lubricated and pre-assembled to make swap-out fast and reliable. The galvanizing process provides superior corrosion resistance compared with painted finishes, making these hubs a practical choice for trailers used near salt water or in wet climates.

How will these hubs fit my trailer axle?

These hubs are made for 5-bolt, 4.5" bolt-pattern idler hubs that pair with 3,500 lb (3500 lb) trailer axles. They accept the common L44649 outer bearing and L68149 inner bearing, and accommodate spindles sized from 1-1/16" to 1-3/8".

• Bolt pattern: 5 on 4.5"
• Bearing inner diameters: L44649 (1-1/16"), L68149 (1-3/8")
• Spindle compatibility: 1-1/16" to 1-3/8"
• Rated axle capacity: 3,500 lb

What makes the galvanizing and pre-assembly valuable?

Hot-dip galvanizing coats the steel in a thick, bonded zinc layer that resists rusting from road spray and seawater far better than standard paint. Pre-assembly and factory greasing mean fewer steps at the trailer, reducing installation time and the chance of missing small parts or lubrication.

• Hot-dip galvanized finish for enhanced corrosion protection
• Bearings pre-lubricated with grease
• Sealed with plastic caps to prevent grease leakage during transit
• Fast, lower-risk installation compared with unassembled kits

What components are included in each 2-hub kit?

The box is a complete replacement package: two hubs plus the full complement of bearings, seals, nuts and small hardware. Parts arrive packed in a heavy-duty box with bubble wrap to prevent damage in transit.

• 2 galvanized idler hubs (5 bolt, 4.5")
• 2 L44649 outer bearings and 2 L68149 inner bearings
• 2 grease seals (171255TB) and 2 dust caps
• 10 lug nuts, spindle nuts, washers, cotter pins and rubber plugs

How durable and precise are the hub components?

Manufactured to a high standard using carbon steel hubs and precision bearing steel, these assemblies follow US G3000-style quality expectations. The bearings and double-lip grease seals are designed for quieter operation and to reduce the risk of lubricant loss under normal use.

• Hub material: high-quality carbon steel with anti-rust treatment
• Bearings: precision steel bearings for reduced noise
• Grease seal: double-lip design to minimize leakage
• Packed securely to prevent shipping damage

Who is this for: This kit is intended for trailer owners, fleet operators and RV or boat trailer enthusiasts who need a full replacement or upgrade for 3,500 lb idler hubs. It suits anyone wanting a corrosion-resistant, ready-to-install solution with all bearings and hardware included—particularly helpful for trailers used in coastal environments or wet climates where galvanized protection matters.