Section Width135 mm (5.3")
Aspect Ratio25%
Rim Diameter66"
Overall Diameter1744 mm (68.7")
Sidewall Height34 mm
Circumference5479 mm
135/25R66 — Buy Tires

Everything to know about the 135/25R66 tire size

Size geometry

A 135/25R66 tire has a 135mm section width and a 25% aspect ratio, mounted on a 66-inch rim. Sidewall height works out to 33.8mm (1.33") and overall outside diameter is 1743.9mm (68.66"). At highway speed the tire completes about 183 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 135/25R66 is unavailable, the closest same-diameter substitutes on the same rim are 125/27R66 and 145/23R66. 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 135/25R66 you can upsize to 145/15R67 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 125/37R65 (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 135/25R66 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 135/25R66

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