145/166R12 Tire Size Specifications
This tire size 145/166R12 fits 0 vehicles in our database.
Everything to know about the 145/166R12 tire size
Size geometry
A 145/166R12 tire has a 145mm section width and a 166% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 240.7mm (9.48") and overall outside diameter is 786.2mm (30.95"). At highway speed the tire completes about 405 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 145/166R12 is unavailable, the closest same-diameter substitutes on the same rim are 135/178R12 and 155/155R12. Both keep your speedometer reading within 1% â safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.
Plus / minus sizing options
For a 145/166R12 you can upsize to 155/147R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 135/188R11 (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 145/166R12 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance â match these specs to your wheel before purchasing tires.
Vehicles Using 145/166R12
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