Wheel Center Cap Size Chart: 54mm, 56mm, 60mm, 68mm, 75mm & More

If you need the right wheel center cap size, start with the cap’s actual measurements—not your wheel diameter. Common sizes include 54mm, 56mm, 57mm, 60mm, 62mm, 65mm, 68mm, 69mm, 70mm, 75mm, and 76mm, but the same diameter does not guarantee the same fit.

A few millimeters can make the difference between a cap that snaps in securely and one that will not fit or keeps falling out. This wheel center cap size chart helps you narrow down the right size before you order.

Wheel Center Cap Size Chart

The table below shows common center cap sizes and their approximate inch equivalents.

Center Cap Size	Approx. Size in Inches	General Use
54mm	2.13″	Smaller car and aftermarket applications
56mm	2.20″	Common OEM and aftermarket applications
57mm	2.24″	Various passenger-car applications
60mm	2.36″	Many cars and aftermarket wheels
62mm	2.44″	Various OEM and aftermarket wheels
63mm	2.48″	Various car and SUV applications
65mm	2.56″	OEM and aftermarket wheels
68mm	2.68″	Common OEM and aftermarket size
69mm	2.72″	Various OEM and aftermarket applications
70mm	2.76″	Various wheel designs
75mm	2.95″	Common larger passenger-car applications
76mm	2.99″	Various OEM and aftermarket wheels

Important: This is a reference chart, not a universal fitment chart. A 68mm center cap from one wheel may not fit another 68mm application because the rear mounting diameter, clips, depth, or attachment style can be different.

For a wider selection of sizes, you can browse wheel center caps and compare the complete specifications.

What Does Wheel Center Cap Size Actually Mean?

When someone says a center cap is 60mm or 68mm, that number does not always tell you everything you need to know.

There are several measurements that affect fit.

Outer Diameter

The outer diameter (OD) is the width across the visible front of the cap.

Measure from one outside edge to the opposite outside edge through the widest point.

This tells you how large the face of the cap is, but it is only one part of the fit.

Inner or Mounting Diameter

The inner or mounting diameter relates to the part of the cap that attaches to the wheel.

This measurement is important because the retaining clips, tabs, or ring must match the wheel’s mounting area.

A cap with the correct front diameter can still be wrong if its rear mounting dimensions do not match.

Cap Depth

Cap depth is how far the cap extends behind the wheel.

This matters when there is limited space around the hub, axle, or other components.

A cap can have the right diameter and still fail to seat correctly if its depth is wrong.

For a more detailed explanation of these measurements, see this wheel center cap measurement guide.

Common Wheel Center Cap Sizes Explained

54mm Center Caps

54mm center caps are among the smaller sizes you may see when shopping for replacement caps.

They are often found in smaller wheel applications and some aftermarket wheels.

Do not order a 54mm cap just because the front of your old cap looks close to that size. Check the rear mounting dimensions as well.

56mm Center Caps

56mm center caps are another common size found across different wheel applications.

A 56mm cap can look almost identical to a 57mm cap, but that 1mm difference can matter when the cap uses a tight snap-fit mounting system.

Always compare the actual measurements before ordering.

60mm Center Caps

60mm center caps are widely used across different car and aftermarket wheel applications.

If you are replacing a 60mm cap, check:

• Outer diameter
• Rear mounting diameter
• Depth
• Clip position
• Attachment style

The number “60mm” alone is not enough to confirm fitment.

68mm Center Caps

68mm center caps are another size that appears frequently in wheel listings.

You will find 68mm options in different designs, including replacement, branded, blank, and aftermarket center caps.

The key point is that two 68mm caps can still have different mounting systems. Check the complete product dimensions before buying.

75mm Center Caps

75mm center caps are commonly found in larger passenger-car and aftermarket applications.

Because 75mm is close to 76mm, measuring accurately is especially important.

Do not assume a 75mm cap will replace a 76mm cap simply because the difference looks small.

Other Common Sizes

You may also come across:

• 57mm center caps
• 62mm center caps
• 63mm center caps
• 65mm center caps
• 69mm center caps
• 70mm center caps
• 76mm center caps

There are also many larger sizes for trucks, specialty wheels, and aftermarket applications.

For example, current wheel listings include sizes well beyond 75mm, so the chart above should be used to narrow your search rather than replace proper fitment checking.

How to Find Your Wheel Center Cap Size

The safest approach is to identify the exact cap and wheel before ordering.

If You Still Have the Old Cap

This is the easiest situation.

Remove one cap carefully and inspect both sides.

Look for:

• Part number
• Brand or wheel model
• Size marking
• Retaining clips
• Metal tension ring
• Mounting style

Then measure the cap with a digital caliper if you have one.

Take the measurements in millimeters. Avoid rounding measurements from inches because even a small difference can affect fitment.

American Wheels Company’s measurement guide also recommends checking the outside diameter, inside diameter, and depth when identifying a replacement cap.

If the Cap Is Missing

You can measure the center opening on the wheel to narrow down your options.

However, this is less reliable than measuring an original cap.

The wheel opening can have a bevel, retaining groove, or other design feature that affects how the cap sits.

If another wheel still has the same cap, remove that cap and use it as your reference.

You can also use a dedicated replacement cap guide to help identify the right replacement.

Does Wheel Diameter Determine Center Cap Size?

No. This is one of the most common mistakes people make.

A 17-inch wheel does not need a 17-inch center cap.

The 17-inch measurement describes the wheel’s overall diameter. The center cap covers only the center opening of the wheel.

For example, two 18-inch wheels can have completely different center cap sizes.

That is why you should never choose a center cap based only on whether your wheel is 17, 18, 19, or 20 inches.

Are Wheel Center Caps Universal?

No, not all wheel center caps are universal.

Some caps are designed to work with multiple wheel applications, but “universal” does not mean one cap fits every wheel.

Different wheels can have different:

• Outer diameters
• Mounting diameters
• Depths
• Clip designs
• Retaining rings
• Attachment styles
• Center openings

Even if two caps have the same visible diameter, their rear mounting systems can be different.

A useful fitment rule is to match the cap to the wheel, not just the vehicle. Wheel Center Caps’ CapMatch guide follows the same approach when helping shoppers identify replacement caps.

How to Choose the Right Center Cap

Follow these steps before placing an order.

1. Identify the Wheel

Find the wheel brand and model if possible.

This is especially useful for aftermarket wheels because the vehicle’s make and model alone may not identify the correct cap.

2. Check the Existing Cap

If one original cap remains, remove it and inspect the back.

A part number can make identification much easier.

3. Measure the Cap

Measure the:

• Outer diameter
• Inner/mounting diameter
• Depth

Use millimeters for all measurements.

4. Check the Mounting Style

Look at how the cap attaches.

It might use:

• Snap-in clips
• Retaining tabs
• A tension ring
• Screws
• Push-through mounting
• Another wheel-specific system

5. Compare Complete Specifications

Do not compare only the front diameter.

For example, searching for a “68mm center cap” gives you a starting point. You still need to compare the rear mounting dimensions and depth.

6. Confirm Before Ordering

If the measurements do not match, stop and recheck them.

A product photo is not enough to confirm fitment.

Common Center Cap Sizing Mistakes

Choosing a Cap by Wheel Diameter

An 18-inch wheel does not tell you whether the center cap is 56mm, 68mm, 75mm, or another size.

Measuring Only the Front

The visible face can match while the rear mounting system does not.

Confusing 54mm, 56mm, and 57mm

These sizes are close, but they are not automatically interchangeable.

Assuming 68mm Fits Every 68mm Opening

The diameter may match while the clips, depth, or attachment method do not.

Ignoring Cap Depth

A cap can fit the opening but fail to seat fully because there is not enough clearance behind it.

Buying by Photo

Two center caps can look nearly identical in a product photo while having completely different rear dimensions.

Guessing From the Vehicle

Your vehicle model helps identify the wheel, but it does not replace measuring the actual cap.

What If Your Center Cap Size Isn’t on the Chart?

Do not worry if your size is not listed above.

Center caps come in many sizes, including smaller and much larger options.

If you have an unusual size:

1. Measure the original cap.
2. Check the back for a part number.
3. Identify the wheel brand and model.
4. Measure the mounting area.
5. Check cap depth.
6. Compare all dimensions with the product specifications.

If the original cap is missing, measure the wheel opening and compare that measurement with the manufacturer’s fitment information.

The goal is not to find the closest number. The goal is to find the correct fit.

Frequently Asked Questions

What is the most common wheel center cap size?

There is no single size that fits all wheels. Sizes such as 54mm, 56mm, 60mm, 68mm, and 75mm are commonly seen, but the correct size depends on the wheel and mounting design.

How do I know what size center cap I need?

Measure an existing cap if possible. Check its outer diameter, mounting diameter, and depth in millimeters. Also check the wheel brand, model, and part number.

Are 54mm, 56mm, and 60mm center caps interchangeable?

No. These are different sizes, and they should not be treated as interchangeable. The mounting dimensions must match the wheel.

What size is a 68mm center cap in inches?

A 68mm center cap is approximately 2.68 inches across. Remember that the inch conversion only describes the measurement; it does not confirm fitment.

What size is a 75mm center cap in inches?

A 75mm center cap is approximately 2.95 inches across. You should still verify the rear mounting dimensions and depth.

Does a 17-inch wheel need a 17-inch center cap?

No. The 17-inch measurement refers to the wheel’s overall diameter. Center caps are much smaller and are sized according to the wheel’s center opening and mounting system.

Can I use any center cap with the same diameter?

No. The same front diameter does not guarantee a proper fit. The mounting diameter, clips, depth, and attachment style also need to match.

Final Takeaway

A wheel center cap size chart is a useful starting point, but it should never be the only thing you use to choose a replacement.

Sizes such as 54mm, 56mm, 60mm, 68mm, and 75mm can help narrow your search. The final decision should come from the actual measurements of your cap and wheel.

If you still have the original cap, measure it in millimeters and check the back for a part number. If it is missing, identify the wheel and carefully measure the center opening.

At American Wheels Company, the safest approach is simple: match the complete fitment, not just the number printed in a size chart.