Section Width125 mm (4.9")
Aspect Ratio280%
Rim Diameter45"
Overall Diameter1843 mm (72.6")
Sidewall Height350 mm
Circumference5790 mm
125/280R45 — Buy Tires

Everything to know about the 125/280R45 tire size

Size geometry

A 125/280R45 tire has a 125mm section width and a 280% aspect ratio, mounted on a 45-inch rim. Sidewall height works out to 350.0mm (13.78") and overall outside diameter is 1843.0mm (72.56"). At highway speed the tire completes about 173 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 125/280R45 is unavailable, the closest same-diameter substitutes on the same rim are 115/304R45 and 135/259R45. 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 125/280R45 you can upsize to 135/250R46 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 115/315R44 (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 125/280R45 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 125/280R45

tire_size.no_vehicles_found