Section Width515 mm (20.3")
Aspect Ratio18%
Rim Diameter27"
Overall Diameter871 mm (34.3")
Sidewall Height93 mm
Circumference2737 mm
515/18R27 — Buy Tires

Everything to know about the 515/18R27 tire size

Size geometry

A 515/18R27 tire has a 515mm section width and a 18% aspect ratio, mounted on a 27-inch rim. Sidewall height works out to 92.7mm (3.65") and overall outside diameter is 871.2mm (34.30"). At highway speed the tire completes about 365 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 515/18R27 is unavailable, the closest same-diameter substitutes on the same rim are 505/18R27 and 525/18R27. 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 515/18R27 you can upsize to 525/15R28 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 505/21R26 (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 515/18R27 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 515/18R27

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