How to Measure Your Wheel Center Cap Size (The Right Way)

Ordering the wrong center cap is one of the most common (and frustrating) mistakes wheel owners make. The good news? Getting the right fit is simple once you know what to measure. This guide walks you through exactly how to measure your wheel center cap size so you can order with confidence.

What Is a Wheel Center Cap?

A wheel center cap is the decorative cover that sits at the center of your wheel, concealing the lug nuts or hub. Beyond aesthetics, center caps protect the hub assembly from road debris, moisture, and corrosion. When one goes missing or gets damaged, finding the right replacement requires knowing a few key measurements.

The 3 Measurements You Need

1. Center Bore Diameter (the most important one)

This is the diameter of the hole in the center of your wheel. Measure across the opening from inner edge to inner edge using a caliper or ruler. Most passenger car wheels range from 54mm to 74mm; truck and SUV wheels often run 78mm to 110mm.

2. Cap Outer Diameter

Some caps snap into the bore; others sit on top of the wheel face. If yours sits on top, measure the full outer diameter of the cap itself — this needs to match the recess on your wheel.

3. Cap Depth / Height

If your wheel has a deep center recess, you'll need a cap with enough depth to sit flush. Measure from the wheel face to the bottom of the recess.

Pro Tip: Check Your Part Number First

Many OEM and aftermarket wheels have a part number stamped on the back of the existing cap or inside the wheel barrel. Search that number directly on The Center Cap Store — our catalog of 10,000+ caps is organized by part number for fast lookup.

Common Center Cap Sizes by Vehicle Type

• Compact cars: 54mm–60mm center bore
• Full-size sedans & crossovers: 63mm–74mm
• Half-ton trucks (F-150, Silverado 1500): 78mm–87mm
• Heavy-duty trucks (F-250, Ram 2500): 98mm–110mm

Shop by Brand

If you know your wheel brand, browsing by brand is often the fastest path to the right cap. Explore our full Center Caps collection to filter by brand and size.

Conclusion

Measuring your center cap takes less than two minutes and saves you the hassle of returns. Grab a caliper, note your three measurements, and you're ready to shop. Still not sure? Drop your part number in our search bar and we'll find your match.