Section Width145 mm (5.7")
Aspect Ratio378%
Rim Diameter27"
Overall Diameter1782 mm (70.2")
Sidewall Height548 mm
Circumference5598 mm
145/378R27 — Buy Tires

Everything to know about the 145/378R27 tire size

Size geometry

A 145/378R27 tire has a 145mm section width and a 378% aspect ratio, mounted on a 27-inch rim. Sidewall height works out to 548.1mm (21.58") and overall outside diameter is 1782.0mm (70.16"). At highway speed the tire completes about 179 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 145/378R27 is unavailable, the closest same-diameter substitutes on the same rim are 135/406R27 and 155/354R27. 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 145/378R27 you can upsize to 155/345R28 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 135/415R26 (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 145/378R27 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 145/378R27

tire_size.no_vehicles_found