Section Width435 mm (17.1")
Aspect Ratio39%
Rim Diameter12"
Overall Diameter644 mm (25.4")
Sidewall Height170 mm
Circumference2024 mm
435/39R12 — Buy Tires

Everything to know about the 435/39R12 tire size

Size geometry

A 435/39R12 tire has a 435mm section width and a 39% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 169.7mm (6.68") and overall outside diameter is 644.1mm (25.36"). At highway speed the tire completes about 494 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 435/39R12 is unavailable, the closest same-diameter substitutes on the same rim are 425/40R12 and 445/38R12. 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 435/39R12 you can upsize to 445/35R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 425/43R11 (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 435/39R12 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 435/39R12

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