BIUIOY 2000 lb Trailer Hub Kit — 5-Lug 5x4.5" Idler Hubs, 2-Set for 1" & 1-1/16" Straight Spindles, Dual Seals

BIUIOY 2000lb trailer hub kit is a two-set, heavy-duty 5-lug idler hub assembly designed for straight 1" and 1-1/16" spindles with a 5×4.5" bolt pattern.

This pair of replacement idler hubs gives you a complete, ready-to-install solution for 2,000 lb axle trailers, boats, and utility trailers that use straight spindles (not tapered). The kit ships with bearings in two standard sizes, dual grease seals, nuts, dust caps and cotter pins so you can select the proper components for either a 1" or 1-1/16" spindle without buying multiple parts. The hubs are black-coated for corrosion resistance and built to withstand normal road and marine conditions.

How do I know these hubs will fit my trailer?

Measure your existing hub and spindle before ordering. The BIUIOY hubs require a 5-bolt pattern spaced as 5×4.5" and accept only straight spindles sized 1" or 1-1/16".

• Confirm hub bolt pattern: 5 bolts with 4.5" center-to-opposite-edge spacing.
• Verify spindle type: must be straight 1" or 1-1/16" (not tapered).
• Check hub outer diameter: 5.6" hub face matches standard 2000 lb idler hubs.
• Compare existing bearings: L44643 for 1" or L44649 for 1-1/16" axles.

What comes in the BIUIOY two-set hub kit and what do I need to install?

The kit includes both hub assemblies and a full set of hardware so most owners have everything on hand for a straightforward replacement. If you already have trailer-specific grease and basic tools, installation is typically a one- or two-person job.

• Included: 2x hubs, bearings for both sizes, dual grease seals (1.25" and 1.5" ID).
• Also included: spindle nuts, cotter pins, washers, dust caps, and rubber plugs.
• Required tools: jack, jack stands, wrench set, bearing packer or grease, mallet and torque wrench recommended.
• Optional: wood block for dust cap installation to avoid deformation.

How durable and sealed are the hubs for road or marine use?

These idler hubs are constructed from high-strength materials with a black-coated finish to resist corrosion and abrasion. A dual-lip oil seal design plus precision bearings help keep grease in and contaminants out under typical towing conditions.

• Black coated finish provides protection against rust and salt exposure.
• Double-lip oil seals (two sizes included) reduce risk of grease leakage.
• High-precision bearings matched to standard road loads for smoother rotation.
• Recommended grease maintenance: inspect annually and replenish as needed.

Who is this for: The BIUIOY 2000 lb two-set idler hub kit is aimed at DIY trailer owners, boaters, and service shops replacing worn hubs on small utility or boat trailers that specifically use straight 1" or 1-1/16" spindles and a 5×4.5" bolt pattern. If you need a complete replacement package with both common bearing sizes and seals included, this kit reduces parts-sourcing time—just verify spindle type and bolt pattern before purchase to ensure a proper fit.