Section Width605 mm (23.8")
Aspect Ratio26%
Rim Diameter18"
Overall Diameter772 mm (30.4")
Sidewall Height157 mm
Circumference2425 mm
605/26R18 — Buy Tires

Everything to know about the 605/26R18 tire size

Size geometry

A 605/26R18 tire has a 605mm section width and a 26% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 157.3mm (6.19") and overall outside diameter is 771.8mm (30.39"). At highway speed the tire completes about 412 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 605/26R18 is unavailable, the closest same-diameter substitutes on the same rim are 595/26R18 and 615/26R18. 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 605/26R18 you can upsize to 615/24R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 595/29R17 (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 605/26R18 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 605/26R18

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