Section Width375 mm (14.8")
Aspect Ratio10%
Rim Diameter18"
Overall Diameter532 mm (20.9")
Sidewall Height38 mm
Circumference1672 mm
375/10R18 — Buy Tires

Everything to know about the 375/10R18 tire size

Size geometry

A 375/10R18 tire has a 375mm section width and a 10% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 37.5mm (1.48") and overall outside diameter is 532.2mm (20.95"). At highway speed the tire completes about 598 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 375/10R18 is unavailable, the closest same-diameter substitutes on the same rim are 365/10R18 and 385/10R18. 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 375/10R18 you can upsize to 385/6R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 365/14R17 (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 375/10R18 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 375/10R18

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