GREPSPUD 5x4.5 Trailer Hub Kit for 3,500 lb Trailers — 1-1/16" to 1-3/8" Tapered Spindle, Bearings & Seals

GREPSPUD's 5x4.5 trailer hub kit is a complete replacement hub assembly for 3,500 lb trailers with 1-1/16" to 1-3/8" tapered spindles, including bearings, seals, lug nuts, and extra dust caps for immediate installation and spares.

This kit supplies everything needed to replace a 5 on 4.5" bolt-pattern idler hub on a 3,500-pound trailer axle with a 1-1/16" inner spindle and 1-3/8" outer spindle fitment. GREPSPUD packages the hub, preinstalled bearing races, grease seals, lug nuts, and additional dust caps and rubber plugs so you can swap hubs without sourcing parts separately. Components carry corrosion-resistant finishes for longer life and the kit is protected with sturdy packaging to arrive in good condition.

What parts are included and what sizes do they match?

The kit includes one 5x4.5" idler hub with bearing races installed, inner and outer bearings (L68149 and L44649), grease seals, lug nuts, and extra dust caps and rubber plugs. The dust cap outer diameter and seal sizes match common 3,500 lb trailer spindles for a direct fit.

• Fits 3,500 lb trailers with 1-1/16" inner and 1-3/8" outer tapered axle spindles
• Bolt pattern: 5 on 4.5" with 1/2"-20 studs
• Bearings: L68149 (I.D. 1-3/8") and L44649 (I.D. 1-1/16")
• Grease seal dimensions: approx. 2.56" O.D. and 1.72" I.D.

How durable are the hub and hardware against rust and wear?

GREPSPUD uses heavy-gauge steel components with rust-mitigating finishes: the hub face has a black protective coating while dust caps are zinc-plated. Rubber seals and plugs resist moisture ingress, and the assembled bearing races reduce installation time. These treatments help reduce corrosion and extend service life under typical towing conditions.

• Black-coated hub surface for corrosion resistance
• Zinc-plated dust caps for added rust protection
• Durable rubber seals to keep grease in and contaminants out
• Bearing races preinstalled to minimize handling and damage

Is installation straightforward and what tools or tips are needed?

Installation is typical for trailer hubs: slide on the hub, set bearings and seals, torque the nut to specification, and press the dust cap into place. The kit includes extra dust caps and rubber plugs as spares. Note: the dust cap is slightly oversized by design and should be installed with a wood block and hammer or rubber mallet to avoid denting.

• Requires standard hub installation tools: bearing packer or grease, torque wrench, mallet
• Use a wood block or rubber mallet to seat the dust cap without deforming it
• Preinstalled races save installation steps
• Extra caps and plugs included for emergencies or replacements

Will this kit fit my trailer axle and wheel studs?

Confirm compatibility by matching your spindle diameters and bolt pattern: this hub is for 1-1/16" to 1-3/8" tapered spindles and 5x4.5" bolt pattern wheels with 1/2"-20 studs. If your trailer uses EZ-Lube or spindle #84 specifications with those dimensions, this GREPSPUD kit is designed to work as a direct replacement.

• Designed for 1-1/16" to 1-3/8" tapered axles (spindle #84 / EZ-Lube)
• 5 on 4.5" bolt pattern with 1/2"-20 lug studs
• Compatibility check recommended before purchase to ensure fit
• Includes standard lug nuts for immediate wheel mounting

Who this kit is for: This GREPSPUD hub assembly suits DIY mechanics, trailer owners, and fleet maintainers who need a full replacement hub for a 3,500 lb trailer with 1-1/16" to 1-3/8" tapered spindles and a 5x4.5" bolt pattern. It’s a practical choice when you want a single, value-packed set with spare dust caps and seals included — ideal for roadside repairs or scheduled maintenance.