Section Width725 mm (28.5")
Aspect Ratio43%
Rim Diameter18"
Overall Diameter1081 mm (42.5")
Sidewall Height312 mm
Circumference3395 mm
725/43R18 — Buy Tires

Everything to know about the 725/43R18 tire size

Size geometry

A 725/43R18 tire has a 725mm section width and a 43% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 311.8mm (12.27") and overall outside diameter is 1080.7mm (42.55"). At highway speed the tire completes about 295 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 725/43R18 is unavailable, the closest same-diameter substitutes on the same rim are 715/44R18 and 735/42R18. 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 725/43R18 you can upsize to 735/41R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 715/45R17 (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 725/43R18 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 725/43R18

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