Section Width105 mm (4.1")
Aspect Ratio405%
Rim Diameter40"
Overall Diameter1867 mm (73.5")
Sidewall Height425 mm
Circumference5864 mm
105/405R40 — Buy Tires

Everything to know about the 105/405R40 tire size

Size geometry

A 105/405R40 tire has a 105mm section width and a 405% aspect ratio, mounted on a 40-inch rim. Sidewall height works out to 425.3mm (16.74") and overall outside diameter is 1866.5mm (73.48"). At highway speed the tire completes about 171 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 105/405R40 is unavailable, the closest same-diameter substitutes on the same rim are 95/448R40 and 115/370R40. 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 105/405R40 you can upsize to 115/359R41 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 95/461R39 (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 105/405R40 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 105/405R40

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