Section Width115 mm (4.5")
Aspect Ratio379%
Rim Diameter39"
Overall Diameter1862 mm (73.3")
Sidewall Height436 mm
Circumference5851 mm
115/379R39 — Buy Tires

Everything to know about the 115/379R39 tire size

Size geometry

A 115/379R39 tire has a 115mm section width and a 379% aspect ratio, mounted on a 39-inch rim. Sidewall height works out to 435.9mm (17.16") and overall outside diameter is 1862.3mm (73.32"). At highway speed the tire completes about 171 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 115/379R39 is unavailable, the closest same-diameter substitutes on the same rim are 105/415R39 and 125/349R39. 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 115/379R39 you can upsize to 125/339R40 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/427R38 (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 115/379R39 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 115/379R39

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