Section Width215 mm (8.5")
Aspect Ratio12%
Rim Diameter31"
Overall Diameter839 mm (33.0")
Sidewall Height26 mm
Circumference2636 mm
215/12R31 — Buy Tires

Everything to know about the 215/12R31 tire size

Size geometry

A 215/12R31 tire has a 215mm section width and a 12% aspect ratio, mounted on a 31-inch rim. Sidewall height works out to 25.8mm (1.02") and overall outside diameter is 839.0mm (33.03"). At highway speed the tire completes about 379 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 215/12R31 is unavailable, the closest same-diameter substitutes on the same rim are 205/13R31 and 225/11R31. 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 215/12R31 you can upsize to 225/6R32 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 205/19R30 (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 215/12R31 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 215/12R31

tire_size.no_vehicles_found