Section Width225 mm (8.9")
Aspect Ratio90%
Rim Diameter12"
Overall Diameter710 mm (27.9")
Sidewall Height203 mm
Circumference2230 mm
225/90R12 — Buy Tires

Everything to know about the 225/90R12 tire size

Size geometry

A 225/90R12 tire has a 225mm section width and a 90% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 202.5mm (7.97") and overall outside diameter is 709.8mm (27.94"). At highway speed the tire completes about 448 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 225/90R12 is unavailable, the closest same-diameter substitutes on the same rim are 215/94R12 and 235/86R12. Both keep your speedometer reading within 1% — safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.

Plus / minus sizing options

For a 225/90R12 you can upsize to 235/81R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 215/100R11 (minus-one) for a softer ride or winter setup. Both stay inside the Âą3% diameter tolerance that ABS and TPMS systems expect.

Vehicle compatibility

0 vehicles in our database run the 225/90R12 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance — match these specs to your wheel before purchasing tires.

Vehicles Using 225/90R12

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