Section Width105 mm (4.1")
Aspect Ratio662%
Rim Diameter18"
Overall Diameter1847 mm (72.7")
Sidewall Height695 mm
Circumference5804 mm
105/662R18 — Buy Tires

Everything to know about the 105/662R18 tire size

Size geometry

A 105/662R18 tire has a 105mm section width and a 662% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 695.1mm (27.37") and overall outside diameter is 1847.4mm (72.73"). At highway speed the tire completes about 172 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 105/662R18 is unavailable, the closest same-diameter substitutes on the same rim are 95/732R18 and 115/604R18. 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 105/662R18 you can upsize to 115/593R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 95/745R17 (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 105/662R18 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 105/662R18

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