What size are my factory wheels?

The factory wheel size is the diameter of the wheel that originally came on your vehicle. For most modern cars, wheel diameters range from 16 to 20 inches, but the exact size depends on the make, model, year, and trim.

How to find your exact factory wheel size

To confirm the precise dimension for your car, check official sources and inspect the wheels themselves. The following methods are the most reliable.

• Door placard: Look on the driver's door jamb or the area near the fuel door for a label that lists wheel size (often shown as 17x7J) and the recommended tire size.


• Owner’s manual or window sticker: The original window sticker (Monroney label) and the manual usually list the factory wheel size for your trim.


• Wheel markings: Inspect the wheel itself for stamped markings such as 17x7.5 ET45, which spell out diameter, width, and offset.


• VIN/build sheet: If you have access to the vehicle’s VIN or build sheet (via dealer or online databases), you can pull exact factory specs including wheel size.

Knowing the exact size is essential for tire compatibility, handling, and safety. Mismatched wheels or tires can affect speedometer accuracy, braking performance, and ride quality.

What the numbers mean

Common wheel-size markings you’ll see

Wheels carry a set of markings that encode diameter, width, shape, and mounting details. Here are the basics you’re most likely to encounter:

• Diameter and width: A marking like 17x7 means a 17-inch-diameter wheel that is 7 inches wide. The first number is diameter; the second is width.


• Bolt pattern and center bore: The bolt pattern (e.g., 5x114.3) specifies how many lug holes and the circle they form; the center bore is the hole in the middle that fits over the hub.


• Offset: A marking such as ET45 (or +45) indicates wheel offset in millimeters; the offset affects clearance to brakes and suspension components.


• Rim type: The letter after the width (e.g., 7J) denotes the rim contour and bead seat profile used for tires.

When you read a tire size like P225/60R17, the 17 indicates the wheel diameter (17 inches) required by the tire; this shows the relationship between tire and wheel, and helps confirm the factory wheel size in practice.

These markings help ensure you select the correct wheel/tire combination and confirm your factory specification when sourcing replacements.

Additional considerations

If your vehicle has aftermarket wheels, or if you’re dealing with a trim that offered multiple wheel options, the factory size may vary. Always confirm via the placard, manual, or dealer records before purchasing replacement wheels or tires.

Summary

In short, your factory wheel size is the diameter of the wheel originally equipped on your car, most commonly between 16 and 20 inches in recent years. Confirm the exact dimension by checking the door placard, owner's manual, wheel markings, or your VIN/build sheet. Understanding the size ensures you choose compatible tires and maintain the vehicle’s safety and performance.

What cars have a 4x100 bolt pattern?

Many cars have a 4x100 bolt pattern, particularly older compact and subcompact models from brands like Honda, Toyota, Mazda, Nissan, and Suzuki. Examples include the Honda Civic, Toyota Corolla, Mazda Miata, and Suzuki Swift. It is also found on certain models from Acura, BMW, Ford, Kia, and others.
 
Honda

• Civic (many generations)
• Accord (1982-1989)
• CRX
• Del Sol
• Prelude (1982-1991)
• Insight
• Fit 

Toyota

• Corolla
• Celica (1986-1991)
• MR2 (1986-1990)
• Paseo
• Tercel
• Echo 

Mazda

• Protege (1990+)
• 323 (1990+)
• MX-3
• Miata (implied by association with 4x100, but check specific models) 

Nissan
Sentra, Pulsar (1987-1990), NX (1987-1990), and 200SX. 
Suzuki
Esteem, Swift, and SX4. 
Others

• Acura: Integra, EL
• Ford: Fiesta (some later generations)
• Kia: Sephia, Stonic
• BMW: E30, E31, E12 (with modifications for some models)
• Chevrolet: Cobalt (check specific rim and year)
• Subaru: Justy
• Volkswagen: Golf 

What size are my factory rims?

To find out the width of your stock wheel, you must look at the back side of the rim itself. Imprinted on a spoke of the OEM wheel is a number, such as 16x7. The “16” refers to the diameter, another way to discover this element, and the “7” refers to the rim's width.

What does 4.80 4.00 8 mean on a tire?

The numbers 4.80/4.00-8 read like this: 4.80" is the tire width, 4.00" is the tire section height (from the inside of the donut hole to the outside) and the 8" is the wheel diameter.

How do I tell what size rims I have?

You can find your rim size by checking for markings on the wheel itself, or by measuring it directly. Look for a series of numbers like "18x7.5" stamped on the back of the rim, where "18" is the diameter and "7.5" is the width. To measure, use a tape measure to find the diameter by measuring from bead seat to bead seat across the wheel, and the width by measuring between the two bead seats on the inside of the rim. 
This video demonstrates how to find your rim size by checking its markings: 47sManiZillaYouTube · Mar 21, 2019
Method 1: Check the rim markings 

• Locate the markings: Look for a series of numbers and letters stamped on the inside or back of the wheel. It may be necessary to remove the wheel and tire to see the markings clearly. 
• Read the size: The markings will typically be in a format like 18x7.5J. 
  • The first number is the diameter in inches (e.g., 18 means an 18-inch diameter). 
  • The second number is the width in inches (e.g., 7.5 means a 7.5-inch width). 
  • Other numbers and letters can indicate things like the bolt pattern and offset, but the first two numbers give you the basic size. 

Method 2: Measure the rim directly 

• Measure the diameter: Use a tape measure to find the distance from the inside lip to inside lip across the wheel's face. This is the rim's diameter. 
• Measure the width: Measure the distance between the two bead seats, which are the inner lips where the tire seals to the rim. Do not measure the outer edge of the rim. 
• Find the bolt pattern: Count the number of lug nut holes on the wheel hub. Then, measure the diameter of the circle that passes through the center of the bolt holes. 

This video shows how to measure your rim's diameter and width: 59sFitment IndustriesYouTube · Mar 13, 2018
What to look for on the tire

• If you can't access the rim markings, you can often find a code for the wheel size on the tire itself, or in your owner's manual or on a sticker inside the driver's side door jamb. 
• For example, in the code P215/65 R15 95H, the last two digits (15) indicate that the rim is a 15-inch diameter. The rim width is not directly shown but is usually about 1.5 inches narrower than the tire's width, which is the first three-digit number in the code.