Section Width125 mm (4.9")
Aspect Ratio326%
Rim Diameter42"
Overall Diameter1882 mm (74.1")
Sidewall Height408 mm
Circumference5912 mm
125/326R42 — Buy Tires

Everything to know about the 125/326R42 tire size

Size geometry

A 125/326R42 tire has a 125mm section width and a 326% aspect ratio, mounted on a 42-inch rim. Sidewall height works out to 407.5mm (16.04") and overall outside diameter is 1881.8mm (74.09"). At highway speed the tire completes about 169 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 125/326R42 is unavailable, the closest same-diameter substitutes on the same rim are 115/354R42 and 135/302R42. 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 125/326R42 you can upsize to 135/292R43 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 115/365R41 (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 125/326R42 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 125/326R42

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