Section Width345 mm (13.6")
Aspect Ratio18%
Rim Diameter32"
Overall Diameter937 mm (36.9")
Sidewall Height62 mm
Circumference2944 mm
345/18R32 — Buy Tires

Everything to know about the 345/18R32 tire size

Size geometry

A 345/18R32 tire has a 345mm section width and a 18% aspect ratio, mounted on a 32-inch rim. Sidewall height works out to 62.1mm (2.44") and overall outside diameter is 937.0mm (36.89"). At highway speed the tire completes about 340 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 345/18R32 is unavailable, the closest same-diameter substitutes on the same rim are 335/19R32 and 355/17R32. 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 345/18R32 you can upsize to 355/14R33 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 335/22R31 (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 345/18R32 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 345/18R32

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