Section Width795 mm (31.3")
Aspect Ratio39%
Rim Diameter18"
Overall Diameter1077 mm (42.4")
Sidewall Height310 mm
Circumference3384 mm
795/39R18 — Buy Tires

Everything to know about the 795/39R18 tire size

Size geometry

A 795/39R18 tire has a 795mm section width and a 39% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 310.1mm (12.21") and overall outside diameter is 1077.3mm (42.41"). At highway speed the tire completes about 295 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 795/39R18 is unavailable, the closest same-diameter substitutes on the same rim are 785/39R18 and 805/39R18. 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 795/39R18 you can upsize to 805/37R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 785/41R17 (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 795/39R18 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 795/39R18

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