Section Width135 mm (5.3")
Aspect Ratio566%
Rim Diameter12"
Overall Diameter1833 mm (72.2")
Sidewall Height764 mm
Circumference5759 mm
135/566R12 — Buy Tires

Everything to know about the 135/566R12 tire size

Size geometry

A 135/566R12 tire has a 135mm section width and a 566% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 764.1mm (30.08") and overall outside diameter is 1833.0mm (72.17"). At highway speed the tire completes about 174 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 135/566R12 is unavailable, the closest same-diameter substitutes on the same rim are 125/611R12 and 145/527R12. 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 135/566R12 you can upsize to 145/518R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 125/621R11 (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 135/566R12 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 135/566R12

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