Section Width375 mm (14.8")
Aspect Ratio18%
Rim Diameter32"
Overall Diameter948 mm (37.3")
Sidewall Height68 mm
Circumference2978 mm
375/18R32 — Buy Tires

Everything to know about the 375/18R32 tire size

Size geometry

A 375/18R32 tire has a 375mm section width and a 18% aspect ratio, mounted on a 32-inch rim. Sidewall height works out to 67.5mm (2.66") and overall outside diameter is 947.8mm (37.31"). At highway speed the tire completes about 336 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 375/18R32 is unavailable, the closest same-diameter substitutes on the same rim are 365/18R32 and 385/18R32. 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 375/18R32 you can upsize to 385/14R33 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 365/22R31 (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 375/18R32 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 375/18R32

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