Section Width935 mm (36.8")
Aspect Ratio13%
Rim Diameter31"
Overall Diameter1031 mm (40.6")
Sidewall Height122 mm
Circumference3237 mm
935/13R31 — Buy Tires

Everything to know about the 935/13R31 tire size

Size geometry

A 935/13R31 tire has a 935mm section width and a 13% aspect ratio, mounted on a 31-inch rim. Sidewall height works out to 121.5mm (4.79") and overall outside diameter is 1030.5mm (40.57"). At highway speed the tire completes about 309 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 935/13R31 is unavailable, the closest same-diameter substitutes on the same rim are 925/13R31 and 945/13R31. 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 935/13R31 you can upsize to 945/12R32 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 925/15R30 (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 935/13R31 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 935/13R31

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