Section Width115 mm (4.5")
Aspect Ratio340%
Rim Diameter42"
Overall Diameter1849 mm (72.8")
Sidewall Height391 mm
Circumference5808 mm
115/340R42 — Buy Tires

Everything to know about the 115/340R42 tire size

Size geometry

A 115/340R42 tire has a 115mm section width and a 340% aspect ratio, mounted on a 42-inch rim. Sidewall height works out to 391.0mm (15.39") and overall outside diameter is 1848.8mm (72.79"). At highway speed the tire completes about 172 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 115/340R42 is unavailable, the closest same-diameter substitutes on the same rim are 105/372R42 and 125/313R42. 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 115/340R42 you can upsize to 125/303R43 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/384R41 (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 115/340R42 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 115/340R42

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