Section Width515 mm (20.3")
Aspect Ratio43%
Rim Diameter18"
Overall Diameter900 mm (35.4")
Sidewall Height221 mm
Circumference2828 mm
515/43R18 — Buy Tires

Everything to know about the 515/43R18 tire size

Size geometry

A 515/43R18 tire has a 515mm section width and a 43% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 221.4mm (8.72") and overall outside diameter is 900.1mm (35.44"). At highway speed the tire completes about 354 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 515/43R18 is unavailable, the closest same-diameter substitutes on the same rim are 505/44R18 and 525/42R18. 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 515/43R18 you can upsize to 525/40R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 505/46R17 (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 515/43R18 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 515/43R18

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