4Pcs 3.31 in Wheel Center Caps Fit 3.31ft Center Bore - Matt Black

In this review the 4Pcs 3.31 in Wheel Center Caps are assessed as a practical, low-cost upgrade for truck, trailer and RV owners who need durable hub protection and a cleaner wheel appearance. The biggest reason to buy is the combination of a full 360 painted finish on premium carbon steel and a push-through fit for a 3.31 in center bore, which provides reliable resistance to salt and road grime while improving the look of standard wheels. This review focuses on real-world fit, finish and value rather than marketing claims.

Key Features

• 360 Painted Finish: Full internal and external black paint protects the metal from salt-corrosion and harsh weather for longer service life.
• Carbon Steel Construction: Sturdy metal body offers impact resistance and a solid feel compared with plastic caps.
• Push Through Installation: Simple installation lets you push the cap through from the back of the rim for quick fitting without special tools.
• Exact Fit Size: Designed specifically for a 3.31 in center bore so it seals the hub and prevents dirt and moisture ingress when dimensions match.
• Low Maintenance: The painted finish is easy to clean and helps repel road salts and grime, reducing corrosion risk on hub surfaces.

Who It's For

These center caps suit owners of trailers, trucks, RVs and SUVs that have a 3.31 in pilot diameter center bore and who want a tougher metal cap than typical plastic alternatives. They are a good choice for users who face wet or salty conditions and need rust-resistant protection and a cleaner wheel appearance.

They are not for wheels with center bores larger or smaller than 3.31 in; buyers who cannot confirm dimensions with a digital caliper should measure before purchasing. Customers seeking decorative styles or multi-piece ornamental caps should look elsewhere, since these are functional matt black carbon steel covers focused on protection and simplicity.

Pros & Cons

Pros

• Durable carbon steel body with full internal and external paint for corrosion resistance.
• Push-through design makes installation fast and tool-free when bore size matches.
• Improves wheel appearance while keeping dirt and moisture out of the hub area.
• Sold in a set of 4, offering straightforward replacement for a full axle.

Cons

• Fits only 3.31 in center bores, so precise measurement is required before purchase.
• The metal material receives mixed impressions from some users who expected lighter weight or different finish options.

Specifications

Brand	GTOWNWORKS
Material	Premium carbon steel with painted finish
Diameter	84 mm / 3.31 in
Internal height	72 mm / 2.83 in
Overall height	76 mm / 2.99 in
Fitment	Fits 3.31 in center bore only (push-through)
Package	Set of 4 center caps

Our Verdict

The 4Pcs 3.31 in Wheel Center Caps are a practical, value-oriented choice for anyone with a matching 3.31 in wheel center bore who wants robust hub protection and a cleaner look. Built from carbon steel with a full painted finish, they resist salt and grime better than many plastic caps and install quickly. For the price and durability, they represent solid value for trailer, truck and RV owners who confirm fit before buying.

Frequently Asked Questions

Will these fit my wheel?
They fit only wheels with a 3.31 in center bore; use a digital caliper to verify the pilot diameter before purchase.

How are they installed?
The caps are push-through: push the cap into the rim opening from the back side until the flange seats to hold it in place.

Are they rust proof?
The carbon steel caps have full internal and external paint for salt-corrosion resistance, but long-term protection depends on maintenance and exposure.