How to Find Your OEM Wheel Size: 5 Easy Methods

Updated: 2026

You need a replacement wheel, but you're staring at your car wondering: what size are my factory wheels? It's not as obvious as it seems — "17-inch" only tells you the diameter. You also need the width, bolt pattern, offset, and center bore to get a wheel that actually fits. Here's exactly how to find every spec you need.

5 Ways to Find Your OEM Wheel Size

1. Check the Wheel Itself

The fastest method. Look at the back of your wheel (inside the barrel) or the inner spoke area. Most OEM wheels have size information stamped or cast into the metal:

• Size format: "17x7.5J" means 17-inch diameter, 7.5-inch width
• Offset: "ET45" means 45mm offset (how far the mounting surface sits from center)
• Part number: OEM-specific (e.g., Toyota 42611-06D10, Ford FL3Z-1007-A)

You'll need to either remove the wheel or look behind the spokes with a flashlight. The markings are almost always on the inside, not the face.

2. Check the Driver's Door Jamb Sticker

Every vehicle sold in the US has a tire and loading information placard on the driver's door jamb. This sticker lists:

• Recommended tire size (e.g., P225/65R17)
• Recommended tire pressure
• Wheel size (on some vehicles)

The tire size tells you the wheel diameter — the last number (R17) is the rim diameter in inches. But it won't tell you width, offset, or bolt pattern. Still, it's a good starting point.

3. Check Your Owner's Manual

The wheels and tires section of your owner's manual lists all factory wheel options for your vehicle, including size and recommended tire specs. If you don't have the physical manual, search "[your year make model] owner's manual PDF" — most manufacturers host them online for free.

4. Use a Wheel Fitment Database

Online fitment tools let you enter your year, make, model, and trim to see all factory wheel options. This is the most complete method because it shows every wheel that was offered, not just the one on your car. You'll get diameter, width, bolt pattern, offset, and hub bore for each option.

5. Measure It Yourself

If the stamped markings are worn off and you can't find specs online, you can measure:

• Diameter: Measure across the inside of the rim (bead to bead), not including the outer lip. This is the "17" in a 17-inch wheel.
• Width: Measure the distance between the inner bead flanges (not the outer edges of the lip). This is the "7.5" in 17x7.5.
• Bolt pattern: Count the lug holes and measure the circle they form. A 5-lug pattern measured across from center of one hole to the far edge of the opposite hole gives you the PCD (e.g., 5x114.3mm).
• Center bore: The diameter of the center hole. Use calipers for accuracy.
• Offset: This requires removing the tire. Measure from the mounting surface to the true center of the wheel width.

Understanding OEM Wheel Specs

Bolt Pattern (PCD)

The number of lugs × the diameter of the circle they sit on. Common patterns:

• 5x114.3mm — Honda, Toyota, Nissan, Hyundai, Ford (many models)
• 5x120mm — BMW, older Honda, Chevy Camaro
• 5x112mm — Audi, VW, Mercedes
• 6x139.7mm — Toyota trucks, Chevy trucks, GMC
• 5x100mm — Subaru, older VW, Toyota Corolla

Bolt pattern must match exactly. There's no "close enough" — even 1mm off and the wheel won't center properly.

Offset (ET)

Offset determines how far the wheel sits in or out relative to the fender:

• Positive offset (e.g., ET45) — Mounting surface is toward the outside. Most front-wheel-drive cars use positive offset.
• Zero offset — Mounting surface is dead center.
• Negative offset (e.g., ET-12) — Mounting surface is toward the inside. Common on trucks and off-road vehicles.

Running the wrong offset by more than ±5mm of factory spec can cause tire rubbing, steering pull, premature bearing wear, and uneven tire wear.

Hub Bore (Center Bore)

The center hole diameter that fits over the hub. OEM wheels are hub-centric — they're machined to fit your vehicle's hub exactly. This centers the wheel precisely. Aftermarket wheels often use a larger bore with plastic hub rings, which is a compromise. OEM is always the better fit.

What Happens If You Get the Wrong Size?

Using the wrong wheel size isn't just a fitment issue — it affects safety:

• Wrong bolt pattern — Wheel won't mount. Period.
• Wrong offset — Tire rubs on fender or suspension components. Accelerates bearing wear.
• Wrong width — Tire sits incorrectly on the rim, affecting handling and wear pattern.
• Wrong hub bore — Wheel isn't centered, causing vibration at all speeds.
• Wrong load rating — Wheel can crack or fail under your vehicle's weight.

This is why we always recommend OEM wheels. Every factory wheel for your vehicle already has the correct specs — diameter, width, bolt pattern, offset, hub bore, and load rating. No guessing, no compatibility issues.

At OEM Wheel Shop, we carry over 47,000 genuine factory wheels. Search by your year, make, and model to find the exact OEM wheel for your vehicle — every spec guaranteed to match.

Frequently Asked Questions

Can I use a different size OEM wheel from a higher trim level?

Usually yes, if it's from the same generation of your vehicle. For example, a Camry LE comes with 16" wheels, but the XSE comes with 19". Both bolt patterns and hub bores are the same — you'd just need tires that match the larger wheel. Check that the offset is compatible and that the bigger wheel clears your brake calipers.

Are OEM wheel sizes the same across model years?

Within a generation, usually yes. When a vehicle gets a full redesign (new generation), wheel specs often change — sometimes the bolt pattern stays the same, sometimes it doesn't. Always verify by specific year, not just model name.

Does tire size affect wheel size?

Tire size and wheel size are linked but different. A P225/45R18 tire goes on an 18-inch wheel that's typically 7.5–8.5 inches wide. The tire manufacturer specifies which rim widths are compatible with each tire size. You can't put an 18-inch tire on a 17-inch wheel — the diameter must match exactly.