Section Width445 mm (17.5")
Aspect Ratio18%
Rim Diameter27"
Overall Diameter846 mm (33.3")
Sidewall Height80 mm
Circumference2658 mm
445/18R27 — Buy Tires

Everything to know about the 445/18R27 tire size

Size geometry

A 445/18R27 tire has a 445mm section width and a 18% aspect ratio, mounted on a 27-inch rim. Sidewall height works out to 80.1mm (3.15") and overall outside diameter is 846.0mm (33.31"). At highway speed the tire completes about 376 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 445/18R27 is unavailable, the closest same-diameter substitutes on the same rim are 435/18R27 and 455/18R27. 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 445/18R27 you can upsize to 455/15R28 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 435/21R26 (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 445/18R27 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 445/18R27

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