Section Width625 mm (24.6")
Aspect Ratio38%
Rim Diameter20"
Overall Diameter983 mm (38.7")
Sidewall Height238 mm
Circumference3088 mm
625/38R20 — Buy Tires

Everything to know about the 625/38R20 tire size

Size geometry

A 625/38R20 tire has a 625mm section width and a 38% aspect ratio, mounted on a 20-inch rim. Sidewall height works out to 237.5mm (9.35") and overall outside diameter is 983.0mm (38.70"). At highway speed the tire completes about 324 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 625/38R20 is unavailable, the closest same-diameter substitutes on the same rim are 615/39R20 and 635/37R20. 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 625/38R20 you can upsize to 635/35R21 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 615/41R19 (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 625/38R20 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 625/38R20

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