155/38R66 Tire Size Specifications
This tire size 155/38R66 fits 0 vehicles in our database.
Everything to know about the 155/38R66 tire size
Size geometry
A 155/38R66 tire has a 155mm section width and a 38% aspect ratio, mounted on a 66-inch rim. Sidewall height works out to 58.9mm (2.32") and overall outside diameter is 1794.2mm (70.64"). At highway speed the tire completes about 177 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 155/38R66 is unavailable, the closest same-diameter substitutes on the same rim are 145/41R66 and 165/36R66. 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 155/38R66 you can upsize to 165/28R67 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 145/49R65 (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 155/38R66 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 155/38R66
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