Section Width115 mm (4.5")
Aspect Ratio78%
Rim Diameter23"
Overall Diameter764 mm (30.1")
Sidewall Height90 mm
Circumference2399 mm
115/78R23 — Buy Tires

Everything to know about the 115/78R23 tire size

Size geometry

A 115/78R23 tire has a 115mm section width and a 78% aspect ratio, mounted on a 23-inch rim. Sidewall height works out to 89.7mm (3.53") and overall outside diameter is 763.6mm (30.06"). At highway speed the tire completes about 417 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 115/78R23 is unavailable, the closest same-diameter substitutes on the same rim are 105/85R23 and 125/72R23. 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 115/78R23 you can upsize to 125/62R24 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/98R22 (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 115/78R23 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 115/78R23

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