What size center caps do I need for 16 inch rims?

There isn’t a universal center-cap size for 16-inch rims. The correct cap diameter depends on the wheel’s design, hub bore, and how the cap mounts. Check the wheel’s manufacturer specs or measure the cap recess to confirm. In practice, you’ll commonly see center-cap diameters around 2.5 to 3 inches (about 63.5–76.2 mm) for 16-inch wheels, but many sizes exist depending on the brand and model.

Understanding why sizes vary

Wheels are engineered with different center-bore diameters, cap mounting methods, and cosmetic recesses. The cap must fit snugly in the wheel’s center opening and align with any retention clips or lips. Because 16-inch rims cover a wide array of makes—from economy sedans to performance cars—center-cap sizes aren’t standardized across all wheels of the same diameter.

How to determine your exact size

To determine the correct size, follow these steps:

• Remove the existing center cap (if present) and measure the diameter of the cap itself, or the opening in the wheel where the cap sits, using a caliper for accuracy.


• Note the hub bore diameter (the hole that fits over the wheel hub). If your bore is larger than the hub, you may need a hub-centric ring, and the cap size should accommodate the ring’s outer diameter.


• Check the wheel manufacturer’s specifications or the OEM parts catalog for the exact center-cap size by wheel model and year.


• Compare your measurement to common cap sizes offered by the wheel brand or aftermarket retailers, paying attention to clip style and mounting method.


• If you’re unsure, bring the wheel or an image to a parts retailer or shop for confirmation.

With a verified measurement, you can select a center cap that matches the diameter and the mounting style so it sits evenly and looks correct.

Common center-cap sizes you’ll encounter on 16-inch rims

For 16-inch wheels, you’ll encounter a handful of sizes, though the exact option depends on the wheel maker. Here are the sizes you’re most likely to see, with quick notes on typical usage:

• 63.5 mm (2.50 inches) — one of the most common sizes for many OEM and aftermarket 16-inch wheels.


• 70 mm (2.75 inches) — a frequent size on a range of brands and some aftermarket designs.


• 76.2 mm (3.0 inches) — used by several brands for certain wheel lines; verify compatibility with your center-bore and clips.


• Other sizes (for example 57–60 mm, 72–75 mm) — appear on some brands; always confirm with the wheel’s official data.

In short, the exact size is tied to your wheel model rather than the rim diameter alone. When in doubt, rely on the wheel’s specifications or consult a trusted retailer.

Practical tips for buying and fitting

Make sure you buy caps designed for your wheel’s clip type and cap retention system, and confirm return options in case of fit issues:

• Match the cap to the wheel's clip mechanism (push-in, spring clips, or threaded center caps) to ensure secure mounting.


• Check compatibility with hub rings if your hub bore is larger than the hub.


• Read the retailer’s product specs; ask for model-by-model fit confirmation when buying online.


• Keep the original caps or photos as reference in case you replace wheels and need the same look.

A careful fit will preserve aesthetics and prevent rattling or cap loss during driving.

Summary

There is no one-size-fits-all center-cap diameter for 16-inch rims. To get the right cap, identify your wheel’s exact model and measure the center opening or consult the manufacturer’s specs. The most common diameters you’ll encounter are about 63.5 mm (2.5"), 70 mm (2.75"), and 76.2 mm (3.0"), but other sizes exist depending on brand and design. Always verify fit before purchasing.

How do I know what size center caps I need?

To find the correct center cap size, measure the wheel's center hole, preferably with calipers for accuracy, to get the inner diameter (I.D.) which is the most critical measurement. If your wheels are a factory part, you can search for a replacement using your car's make and model or the part number found on the old cap. For aftermarket wheels, measure the inner diameter, outer diameter (O.D.), and depth of the cap to find an exact replacement, or consult the manufacturer's website for their part number or specifications.
 
This video demonstrates how to measure the inner diameter of a wheel center cap: 55sDavid ProkityYouTube · Dec 27, 2016
For a proper fit

• Measure the wheel's center bore: 
  • Use calipers for the most accurate measurement of the inner diameter (I.D.) of the wheel's center bore. 
  • If you don't have calipers, a tape measure or ruler can work, but note that it may not be as precise. 
  • Common sizes are 545454 mm, 656565 mm, and 757575 mm, but it's crucial to measure. 
• Check the existing center cap:
  • Measure the inner diameter of the existing center cap from clip to clip, as this is the most critical measurement for fitment. 
  • You may also want to measure the outer diameter (O.D.) and the depth, especially for aftermarket wheels. 
• If you have stock wheels:
  • Google the make and model of your car, followed by "center cap" or "wheel cap," to see if you can identify the correct part. 
  • Look for a part number on the back of the old cap to use in online part databases or with a dealer. 
• If you have aftermarket wheels:
  • Visit the wheel manufacturer's website to find a part number or specifications for the correct center cap. 
  • Contact the manufacturer directly for assistance if needed. 
  • Your local dealer's parts department can also help if the manufacturer is one they support. 

This video explains how to identify the correct center cap size based on your wheel's axle nut size: 59s4 State TrucksYouTube · Apr 22, 2014
Important considerations

• Center bore vs. center cap size: The wheel's center bore (the hole that goes over the hub) is not the same as the center cap size. A center cap should fit within the recessed area on the wheel's face. 
• Aftermarket vs. stock: Aftermarket wheels have a greater variety of sizes and styles, making accurate measurements even more important. 
• Part numbers: Using the correct part number is the most reliable way to ensure compatibility, especially for branded caps. 

What size tire can I put on a 16 inch rim?

Tire sizes for 16-inch rims are numerous and depend on the vehicle, but common examples include 205/55R16 for cars and 265/75R16 for trucks. To find the correct size, you must match the rim diameter to the tire's size and also consider the vehicle's specifications. A variety of sizes are available, such as 245/70R16, 225/65R16, and others.
 
Examples of common 16-inch tire sizes

• For cars: 205/55R16
• For trucks/SUVs: 245/75R16, 265/70R16, 265/75R16
• Other popular options:
  • 195/55R16
  • 215/65R16
  • 235/75R16
  • 225/60R16 

How to choose the right tire size

• Check your vehicle's manual: This is the most reliable way to determine the original equipment manufacturer (OEM) specifications for your car or truck. 
• Look at your current tires: The size is written on the sidewall of the tires currently on your vehicle. 
• Use an online tire selector: Websites for tire manufacturers and retailers have tools where you can input your vehicle's year, make, and model to find compatible sizes. 
• Consult an expert: A professional at a tire shop can provide expert recommendations based on your vehicle, driving style, and budget. 

How do I know my center bore size?

To measure a center bore, place the wheel face down, use digital calipers or a tape measure to find the internal diameter of the central hole, and record the measurement in millimeters. An accurate measurement ensures the wheel will fit your vehicle's hub correctly.
 
Step 1: Prepare the wheel

• Place the wheel flat on a protected surface with the backside facing up to avoid scratching the finish. 

This video demonstrates how to prepare the wheel and find the center bore: 59sTahir ShaikhYouTube · Jan 20, 2024
Step 2: Choose your tool

• Digital calipers: This is the most accurate method for most applications. 
• Tape measure: A standard tape measure can work but may be less precise. 
• Bore gauge: A specialized tool designed for measuring inside diameters, which is very accurate for larger or more critical applications. 

Step 3: Take the measurement

• For calipers: Open the caliper's inside jaws and spread them across the center of the bore until they touch the edges. The digital display will give you the measurement. 
• For a tape measure: Stretch the tape across the center of the bore, measuring the widest part. Try to get the tape as straight as possible to ensure accuracy. 
• For a bore gauge: Insert the gauge into the bore, extend the anvils until they make contact with the edges, and then read the measurement. 

This video shows how to use a digital caliper to measure the wheel's center bore: 1mCar LuvversYouTube · Feb 3, 2024
Step 4: Record the measurement 

• Note the measurement in millimeters (mm), as this is the standard unit for wheel and hub measurements. 

What size center cap for 16 inch rims?

There is no single center cap size for all 16-inch rims; the correct size depends on the wheel's specific design, brand, and whether it's an aftermarket or OEM (Original Equipment Manufacturer) wheel. You must measure the center bore (the opening where the cap fits) of your specific rim or find the original part number to ensure a correct fit. For example, some aftermarket rims use specific sizes like 62mm or 70mm, while some classic styles might have different dimensions like the 7.5-inch center on certain Smoothie wheels.
 
How to find the right size

• Measure the center bore: This is the most reliable method. You can either measure the diameter of the opening on your wheel or measure the diameter of your current cap from the back, at the clip-to-clip distance. 
• Check the OEM part number: If you can find the original part number for your wheel or center cap (sometimes stamped on the back), you can search for that exact number to find a replacement. 
• Identify the wheel brand: If you know the brand and model of your wheel (e.g., Enkei RPF1, Volk Racing TE37), you can often find a compatible center cap size on the manufacturer's website or through parts retailers. 

Example sizes for 16-inch wheels

• Enkei RPF1: Some 16-inch Enkei RPF1 wheels use a 70mm outer diameter cap. 
• Chevy Silverado (8-lug): Many 16-inch Chevy Silverado and GMC Sierra 8-lug rims use a specific OEM cap that is often sold in sets of four, with replacement numbers like 15039489. 
• Classic wheels: Some classic or retro-style 16-inch wheels, like certain Smoothie wheels, use larger caps around 7.5 inches in diameter.