Section Width525 mm (20.7")
Aspect Ratio18%
Rim Diameter28"
Overall Diameter900 mm (35.4")
Sidewall Height95 mm
Circumference2828 mm
525/18R28 — Buy Tires

Everything to know about the 525/18R28 tire size

Size geometry

A 525/18R28 tire has a 525mm section width and a 18% aspect ratio, mounted on a 28-inch rim. Sidewall height works out to 94.5mm (3.72") and overall outside diameter is 900.2mm (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 525/18R28 is unavailable, the closest same-diameter substitutes on the same rim are 515/18R28 and 535/18R28. 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 525/18R28 you can upsize to 535/15R29 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 515/21R27 (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 525/18R28 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 525/18R28

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