Section Width105 mm (4.1")
Aspect Ratio138%
Rim Diameter14"
Overall Diameter645 mm (25.4")
Sidewall Height145 mm
Circumference2028 mm
105/138R14 — Buy Tires

Everything to know about the 105/138R14 tire size

Size geometry

A 105/138R14 tire has a 105mm section width and a 138% aspect ratio, mounted on a 14-inch rim. Sidewall height works out to 144.9mm (5.70") and overall outside diameter is 645.4mm (25.41"). At highway speed the tire completes about 493 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 105/138R14 is unavailable, the closest same-diameter substitutes on the same rim are 95/153R14 and 115/126R14. 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 105/138R14 you can upsize to 115/115R15 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 95/166R13 (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 105/138R14 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 105/138R14

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