Section Width765 mm (30.1")
Aspect Ratio32%
Rim Diameter18"
Overall Diameter947 mm (37.3")
Sidewall Height245 mm
Circumference2974 mm
765/32R18 — Buy Tires

Everything to know about the 765/32R18 tire size

Size geometry

A 765/32R18 tire has a 765mm section width and a 32% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 244.8mm (9.64") and overall outside diameter is 946.8mm (37.28"). At highway speed the tire completes about 336 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 765/32R18 is unavailable, the closest same-diameter substitutes on the same rim are 755/32R18 and 775/32R18. 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 765/32R18 you can upsize to 775/30R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 755/34R17 (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 765/32R18 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 765/32R18

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