Section Width155 mm (6.1")
Aspect Ratio278%
Rim Diameter39"
Overall Diameter1852 mm (72.9")
Sidewall Height431 mm
Circumference5819 mm
155/278R39 — Buy Tires

Everything to know about the 155/278R39 tire size

Size geometry

A 155/278R39 tire has a 155mm section width and a 278% aspect ratio, mounted on a 39-inch rim. Sidewall height works out to 430.9mm (16.96") and overall outside diameter is 1852.4mm (72.93"). At highway speed the tire completes about 172 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 155/278R39 is unavailable, the closest same-diameter substitutes on the same rim are 145/297R39 and 165/261R39. 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 155/278R39 you can upsize to 165/253R40 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 145/306R38 (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 155/278R39 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 155/278R39

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