Section Width325 mm (12.8")
Aspect Ratio90%
Rim Diameter12"
Overall Diameter890 mm (35.0")
Sidewall Height293 mm
Circumference2795 mm
325/90R12 — Buy Tires

Everything to know about the 325/90R12 tire size

Size geometry

A 325/90R12 tire has a 325mm section width and a 90% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 292.5mm (11.52") and overall outside diameter is 889.8mm (35.03"). At highway speed the tire completes about 358 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 325/90R12 is unavailable, the closest same-diameter substitutes on the same rim are 315/93R12 and 335/87R12. 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 325/90R12 you can upsize to 335/84R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 315/97R11 (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 325/90R12 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 325/90R12

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