Section Width305 mm (12.0")
Aspect Ratio18%
Rim Diameter24"
Overall Diameter719 mm (28.3")
Sidewall Height55 mm
Circumference2260 mm
305/18R24 — Buy Tires

Everything to know about the 305/18R24 tire size

Size geometry

A 305/18R24 tire has a 305mm section width and a 18% aspect ratio, mounted on a 24-inch rim. Sidewall height works out to 54.9mm (2.16") and overall outside diameter is 719.4mm (28.32"). At highway speed the tire completes about 442 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 305/18R24 is unavailable, the closest same-diameter substitutes on the same rim are 295/19R24 and 315/17R24. 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 305/18R24 you can upsize to 315/13R25 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 295/23R23 (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 305/18R24 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 305/18R24

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