Section Width445 mm (17.5")
Aspect Ratio70%
Rim Diameter12"
Overall Diameter928 mm (36.5")
Sidewall Height312 mm
Circumference2915 mm
445/70R12 — Buy Tires

Everything to know about the 445/70R12 tire size

Size geometry

A 445/70R12 tire has a 445mm section width and a 70% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 311.5mm (12.26") and overall outside diameter is 927.8mm (36.53"). At highway speed the tire completes about 343 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 445/70R12 is unavailable, the closest same-diameter substitutes on the same rim are 435/72R12 and 455/68R12. 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 445/70R12 you can upsize to 455/66R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 435/75R11 (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 445/70R12 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 445/70R12

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