Find the Right Tires for Your Vehicle
Select your vehicle's year, make, and model to see OEM and compatible tire sizes.
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How the tire size finder works
Not sure what tire size your car needs? Pick your vehicle's year, make and model and the finder returns the factory-recommended OEM tire size for that configuration — plus a set of compatible alternate sizes you can run instead. Every alternate is checked with computed geometry, so you are looking at sizes that actually fit, not a generic list.
Select your vehicle
Choose year, then make, then model. Each step narrows the list to the exact vehicle you're fitting.
See the OEM tire size
Get the factory tire size for your make, model and year — the same size printed on your door-jamb placard.
Compare validated alternates
Plus-size and minus-size options are validated against the ±3% overall-diameter rule, so your speedometer and clearances stay close to stock.
Shop the size
Jump straight to tire retailers pre-filtered to your size, or open the full spec page for revs-per-mile and sidewall details.
The ±3% rule, in plain terms
A replacement tire is generally considered safe when its overall diameter is within roughly 3% of the OEM tire's diameter. Stay inside that window and your speedometer reading, gearing and clearances remain close to factory. This finder computes each alternate's diameter and only treats sizes inside the ±3% band as compatible.
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Frequently asked questions
How do I find my OEM tire size?
Select your vehicle's year, make and model in the finder above and it returns the factory-recommended OEM tire size. You can also read it directly from the placard on the driver's door jamb or in your owner's manual — it looks like 225/45R18.
What tire size does my car use?
Tire size is tied to the exact make, model and year — and sometimes the trim. Use the wizard to pick your vehicle and you'll see the OEM size for that configuration, along with compatible alternate sizes that have been validated to fit.
What is the ±3% rule?
It's the industry guideline that a replacement tire's overall diameter should stay within about 3% of the original equipment tire's diameter. Within that range, your speedometer, odometer and clearances stay close to stock. The finder computes each alternate's diameter and flags only sizes inside the ±3% band as compatible.
Are plus-size tires safe?
Plus-sizing — going to a larger wheel with a lower-profile tire — is fine when the new size keeps overall diameter within the ±3% window so the rolling circumference barely changes. Always confirm load index, speed rating and clearance for your specific vehicle before fitting.
Can I read a tire size from the sidewall?
Yes. A code like 225/45R18 means 225 mm section width, a 45% aspect ratio (sidewall height as a percentage of width), radial construction (R) and an 18-inch wheel diameter. The finder shows the same notation so it's easy to cross-check against the tires on your car.
Is the tire finder free?
Yes — looking up OEM and alternate tire sizes by vehicle is free and needs no account. If you want the same fitment data programmatically, it's also available through the tire sizes API.