Section Width115 mm (4.5")
Aspect Ratio408%
Rim Diameter38"
Overall Diameter1904 mm (74.9")
Sidewall Height469 mm
Circumference5980 mm
115/408R38 — Buy Tires

Everything to know about the 115/408R38 tire size

Size geometry

A 115/408R38 tire has a 115mm section width and a 408% aspect ratio, mounted on a 38-inch rim. Sidewall height works out to 469.2mm (18.47") and overall outside diameter is 1903.6mm (74.94"). At highway speed the tire completes about 167 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 115/408R38 is unavailable, the closest same-diameter substitutes on the same rim are 105/447R38 and 125/375R38. 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 115/408R38 you can upsize to 125/365R39 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/459R37 (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 115/408R38 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 115/408R38

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