385/78R12 Tire Size Specifications
This tire size 385/78R12 fits 0 vehicles in our database.
Everything to know about the 385/78R12 tire size
Size geometry
A 385/78R12 tire has a 385mm section width and a 78% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 300.3mm (11.82") and overall outside diameter is 905.4mm (35.65"). At highway speed the tire completes about 352 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 385/78R12 is unavailable, the closest same-diameter substitutes on the same rim are 375/80R12 and 395/76R12. 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 385/78R12 you can upsize to 395/73R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 375/83R11 (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 385/78R12 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 385/78R12
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