Section Width285 mm (11.2")
Aspect Ratio236%
Rim Diameter18"
Overall Diameter1802 mm (71.0")
Sidewall Height673 mm
Circumference5662 mm
285/236R18 — Buy Tires

Everything to know about the 285/236R18 tire size

Size geometry

A 285/236R18 tire has a 285mm section width and a 236% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 672.6mm (26.48") and overall outside diameter is 1802.4mm (70.96"). At highway speed the tire completes about 177 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 285/236R18 is unavailable, the closest same-diameter substitutes on the same rim are 275/245R18 and 295/228R18. 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 285/236R18 you can upsize to 295/224R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 275/249R17 (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 285/236R18 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 285/236R18

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