Section Width315 mm (12.4")
Aspect Ratio20%
Rim Diameter25"
Overall Diameter761 mm (30.0")
Sidewall Height63 mm
Circumference2391 mm
315/20R25 — Buy Tires

Everything to know about the 315/20R25 tire size

Size geometry

A 315/20R25 tire has a 315mm section width and a 20% aspect ratio, mounted on a 25-inch rim. Sidewall height works out to 63.0mm (2.48") and overall outside diameter is 761.0mm (29.96"). At highway speed the tire completes about 418 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 315/20R25 is unavailable, the closest same-diameter substitutes on the same rim are 305/21R25 and 325/19R25. 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 315/20R25 you can upsize to 325/15R26 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 305/25R24 (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 315/20R25 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 315/20R25

tire_size.no_vehicles_found