Section Width725 mm (28.5")
Aspect Ratio21%
Rim Diameter31"
Overall Diameter1092 mm (43.0")
Sidewall Height152 mm
Circumference3430 mm
725/21R31 — Buy Tires

Everything to know about the 725/21R31 tire size

Size geometry

A 725/21R31 tire has a 725mm section width and a 21% aspect ratio, mounted on a 31-inch rim. Sidewall height works out to 152.3mm (5.99") and overall outside diameter is 1091.9mm (42.99"). At highway speed the tire completes about 292 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 725/21R31 is unavailable, the closest same-diameter substitutes on the same rim are 715/21R31 and 735/21R31. 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 725/21R31 you can upsize to 735/19R32 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 715/23R30 (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 725/21R31 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 725/21R31

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